采用流延成膜工艺制备了CCMC/PVA生物降解复合膜，研究了PVA、乙二醛以及PPE 3种成膜助剂对复合膜的力学性能和生物降解性能的影响。结果表明：添加一定量的成膜助剂，可以增强复合膜的机械性能、调控复合膜的生物降解性能；当PVA添加量为30% (质量分数)、乙二醛添加量为2% (质量分数)、PPE添加量为0.6%（质量分数）时，复合膜的拉伸强度可达22.5 MPa，断裂伸长率可达258%，固体琼脂平板培养50 d，微生物生长达到4级，土埋100 d，复合膜失重率达到92%。

CCMC/PVA blend film was prepared by solution mixing method. The effect of PVA, PPE and glyoxal on the mechanical and biodegradable properties of blend films were studied. The results showed that the mechanical property of CCMC/PVA blend films increased remarkably and the biodegradable properties of CCMC/PVA blend films were controlled artificially with the added amount of phragmoid addition agent. The tensile strength was 22.5 MPa, elongation at break was 258%, the growth rate of microbe was grade-4 by agar plate culture for 50d and the weight loss ratio of CCMC/PVA blend films was 92% after 100days under the earth when the mass fraction of PVA was 30%, the mass fraction of PPE was 0.6% and the mass fraction of glyoxal was 2% respectively.