Abstract: 2.5D woven carbon fiber-glass fiber/bismaleimide resin composite was prepared by three-dimensional textile technology and resin transfer molding (RTM), and the mechanical properties of three-point bending and interlaminar shear were tested at room temperature (25℃) and high temperature (150℃, 240℃, 300℃), respectively, and the influence of temperature on the mechanical behavior and damage mechanism of the composites was explored. The results show that temperature has a significant effect on the mechanical properties and damage mode of 2.5D woven carbon fiber-glass fiber/bismaleimide resin composites. Temperature rise leads to weakening of fiber/matrix interface adhesion. Compared with the room temperature environment, the flexural strength, flexural modulus and interlaminar shear strength of the composite at 300℃ decrease by 23.06%, 70.01% and 18.93%. Under bending load, the failure mode of 2.5D woven hybrid composites at room temperature is mainly dominated by local fiber fracture and matrix cracking, while high temperature damage is dominated by fiber/matrix interface debonding. Under shear load, the failure mode of 2.5D woven hybrid composites at room temperature is mainly stratified failure. With the increase of temperature, the composites appear plastic deformation due to the softening of matrix, matrix cracking, interface debonding and stratified failure determine the final failure of the material.