This study presents core-sheath CNT@MXene fibers with a gradient conductive structure for absorption-dominated electromagnetic interference (EMI) shielding fabrics. The fibers, constructed via wet spinning, consist of carbon nanotubes (CNTs) as the sheath and MXene as the core. The gradient conductive structure allows for easy optimization of conductivity by adjusting the core MXene and sheath CNT content. This structure enhances electromagnetic wave incidence and interaction with the composite, leading to excellent EMI absorption. The fabric exhibits an EMI shielding effectiveness of 23.40 dB and an absorption coefficient of 0.63 in the X-band frequency range. The fibers maintain stable electrical conductivity under various conditions, including multi-cycle bending, stretching, ultrasonic treatment, and high humidity. The fabric also shows EMI shielding stability in indoor environments. The gradient structured fibers demonstrate great potential for next-generation eco-friendly EMI shielding fabrics with an absorption-dominated mechanism, reducing secondary radiation pollution. Traditional metal-based EMI shielding materials cause impedance mismatch and lead to reflections, while absorption-dominated materials are more effective. Recent research has focused on absorption performance, with strategies including porous structures, nano-architectures, and multilayer structures. Conductive gradient networks in multilayer materials improve impedance matching, reducing reflections and enhancing absorption. Traditional fibers are often natural or polymer-based, but coating fabrics with conductive gradients increases thickness and reduces comfort. Gradient structured fibers offer a potential solution for efficient EMI shielding. The study reports a well-designed core-sheath fiber with a gradient conductive network, featuring absorption-dominated EMI shielding ability. MXene was prepared by etching Ti3AlC2 with LiF/HCl. CNT@MXene fibers were fabricated via coaxial wet spinning. The fibers exhibited good toughness, environmental stability, and gradient conductivity. The core-sheath structure allows for easy regulation of the fiber's conductive gradient. The corresponding fabric showed ideal EMI shielding effectiveness and high absorption characteristics. The coaxial fiber and fabric exhibited stable conductivity and EMI shielding performance due to the polymer protection in the fiber. This work demonstrates the advantages of gradient conductive structured fibers for developing efficient EMI shielding fabrics with reduced secondary radiation pollution.This study presents core-sheath CNT@MXene fibers with a gradient conductive structure for absorption-dominated electromagnetic interference (EMI) shielding fabrics. The fibers, constructed via wet spinning, consist of carbon nanotubes (CNTs) as the sheath and MXene as the core. The gradient conductive structure allows for easy optimization of conductivity by adjusting the core MXene and sheath CNT content. This structure enhances electromagnetic wave incidence and interaction with the composite, leading to excellent EMI absorption. The fabric exhibits an EMI shielding effectiveness of 23.40 dB and an absorption coefficient of 0.63 in the X-band frequency range. The fibers maintain stable electrical conductivity under various conditions, including multi-cycle bending, stretching, ultrasonic treatment, and high humidity. The fabric also shows EMI shielding stability in indoor environments. The gradient structured fibers demonstrate great potential for next-generation eco-friendly EMI shielding fabrics with an absorption-dominated mechanism, reducing secondary radiation pollution. Traditional metal-based EMI shielding materials cause impedance mismatch and lead to reflections, while absorption-dominated materials are more effective. Recent research has focused on absorption performance, with strategies including porous structures, nano-architectures, and multilayer structures. Conductive gradient networks in multilayer materials improve impedance matching, reducing reflections and enhancing absorption. Traditional fibers are often natural or polymer-based, but coating fabrics with conductive gradients increases thickness and reduces comfort. Gradient structured fibers offer a potential solution for efficient EMI shielding. The study reports a well-designed core-sheath fiber with a gradient conductive network, featuring absorption-dominated EMI shielding ability. MXene was prepared by etching Ti3AlC2 with LiF/HCl. CNT@MXene fibers were fabricated via coaxial wet spinning. The fibers exhibited good toughness, environmental stability, and gradient conductivity. The core-sheath structure allows for easy regulation of the fiber's conductive gradient. The corresponding fabric showed ideal EMI shielding effectiveness and high absorption characteristics. The coaxial fiber and fabric exhibited stable conductivity and EMI shielding performance due to the polymer protection in the fiber. This work demonstrates the advantages of gradient conductive structured fibers for developing efficient EMI shielding fabrics with reduced secondary radiation pollution.