Abstract: Bamboo is a natural composite material, which is composed of bamboo fiber as reinforcement and lignin as matrix. The bamboo fiber structure endows bamboo with the characteristics of high strength, and the porous lignin structure endows bamboo with the characteristics of light and high toughness. In this paper, carbon fiber reinforced bamboo structure porous polyethersulfone matrix composites (CF/foam PES) were prepared by imitating the structural characteristics of bamboo, and porous polyethersulfone was deposited on the surface of carbon fiber by liquid immersion method and immersion precipitation phase transformation method. The results show that: compared with traditional carbon fiber reinforced dense polyethersulfone matrix composites (CF/condense PES), CF/foam PES prepared in this paper has low apparent density; the specific strength and specific modulus of CF/foam PES are 234.5% and 192.6% higher than those of CF/condense PES. Moreover, the porous polyethersulfone matrix enhances the energy absorption properties of CF/foam PES.