PLA-g-BF grafting copolymer was prepared by alkali-treated modified bamboo fiber and lactic acid. PLA-g- BF grafts were compounded with chitosan(CS) and polyvinyl alcohol(PVA) as raw materials to prepare bamboo fiber composite hydrophilic membranes. The effects of mass concentration of chitosan solution and mass ratio of PLA-g-BF grafting copolymer/CS(PVA) solution on the structure

tensile strength

morphology

hydrophilicity

adhesion and degradability of the prepared bamboo fiber composite hydrophilic membrane were investigated. The results show that when the concentration of CS solution was 1∶40 (g/mL)

the quality ratio of grafting copolymer/CS solution was 2∶40

the tensile strength of the film was 4.93 MPa

the contact angle was 72.9°

the hardness value was 2H

and was basically nondegradable. When the concentration of PVA solution was 7%

the quality ratio of grafting copolymer/PVA solution was also 2∶40

the tensile strength was 17.2 MPa

the contact angle was 53.2°

the hardness value was 5H and was degraded within 6 days.