为有效解决石化基地膜不可降解造成的土壤污染问题，推动农业产业的可持续发展，在单因素实验基础上，以明胶/壳聚糖为基底，羟丙基甲基纤维素（HPMC）为增强相，甘油为增塑剂，利用Design Expert软件设计了以明胶/壳聚糖质量分数、明胶/壳聚糖比例、HPMC质量分数为自变量，以地膜的土壤失水量为响应值的三因素三水平试验。结果表明：当明胶/壳聚糖比例为6∶1、明胶/壳聚糖质量分数为7.3%、HPMC质量分数为2.1%时，生物降解地膜保水性能最优。此配方下生物降解地膜抗拉强度为34.3 MPa，透光率为35.8%，35 d降解率为92.7%。制备的新型生物降解地膜为土壤污染防治等方面的应用提供依据。

In order to effectively solve the soil pollution problem caused by non degradable membranes in petrochemical bases and promote the sustainable development of the agricultural industry, this study designed a three factor three-level experiment based on single factor experiments, using gelatin/chitosan as the substrate, hydroxypropyl methylcellulose (HPMC) as the reinforcing phase, and glycerol as the plasticizer. Design Expert software was used to design an experiment with gelatin/chitosan mass fraction, gelatin/chitosan ratio, and HPMC mass fraction as independent variables and soil moisture loss of plastic film as the response value. The results show that the water retention performance of biodegradable mulch film is optimal when the gelatin/chitosan ratio is 6∶1, the gelatin/chitosan mass fraction is 7.3%, and the HPMC mass fraction is 2.1%. The tensile strength of the biodegradable film is 34.3 MPa, the light transmission rate is 35.8%, and the degradation rate is 92.7% in 35 days. The new biodegradable mulch prepared provides a basis for the possible application of soil pollution control and other aspects.