The review discusses the negative impacts of heat stress (HS) on poultry, particularly chickens, and explores the potential of medicinal plants (MPs) to mitigate these adverse effects. HS, caused by global climate change, leads to reduced growth performance, immune dysfunction, intestinal inflammation, and oxidative stress in chickens. MPs, rich in bioactive compounds such as antioxidants, antimicrobials, and anti-inflammatory agents, have shown promise in improving these conditions. Studies have demonstrated that MPs like *Artemisia annua*, *Olea europaea*, *Silybum marianum*, *Foeniculum vulgare*, *Thymus vulgaris*, and *Salvia rosmarinus* can enhance growth, reduce oxidative stress, improve immune function, and protect intestinal health in heat-stressed chickens. These plants can stimulate the antioxidant system, modulate immune responses, and maintain gut microbiota balance. The review highlights the need for further research to understand the molecular mechanisms and interactions between MPs, intestinal microbiota, and intestinal barriers, aiming to develop more effective and sustainable methods to support poultry health under HS conditions.The review discusses the negative impacts of heat stress (HS) on poultry, particularly chickens, and explores the potential of medicinal plants (MPs) to mitigate these adverse effects. HS, caused by global climate change, leads to reduced growth performance, immune dysfunction, intestinal inflammation, and oxidative stress in chickens. MPs, rich in bioactive compounds such as antioxidants, antimicrobials, and anti-inflammatory agents, have shown promise in improving these conditions. Studies have demonstrated that MPs like *Artemisia annua*, *Olea europaea*, *Silybum marianum*, *Foeniculum vulgare*, *Thymus vulgaris*, and *Salvia rosmarinus* can enhance growth, reduce oxidative stress, improve immune function, and protect intestinal health in heat-stressed chickens. These plants can stimulate the antioxidant system, modulate immune responses, and maintain gut microbiota balance. The review highlights the need for further research to understand the molecular mechanisms and interactions between MPs, intestinal microbiota, and intestinal barriers, aiming to develop more effective and sustainable methods to support poultry health under HS conditions.