The work aims to alleviate the environmental pollution caused by traditional plastic wrap, and provide a theoretical basis for the development of food packaging materials with better mechanical properties and antibacterial properties. With sodium alginate and sodium carboxymethyl cellulose as the main membrane forming materials, composite membranes were prepared by the casting film method with the addition of tea powder. Based on tensile strength, elongation at break, single factor and response surface tests were conducted to determine the best technology of tea powder /CMC-Na/AL-Na composite membranes. The results showed that when the CMC Na:AL Na ratio was 84:16, the tea powder addition was 1.43%, the drying temperature was 50 ℃, and the drying time was 7 hours, the composite membrane had the best comprehensive property, with a tensile strength of 16.60 N/mm2 and an elongation at break of 19.11%, showing good mechanical properties, water resistance, antioxidant properties, and antibacterial properties. In conclusion, the prepared tea powder/CMC-Na/AL-Na composite membrane has good mechanical properties, antioxidant properties, and antibacterial properties.