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<b>Objective:</b> This study aimed to develop a green and environment-friendly sodium alginate/starch/tea powder composite membrane. <b>Methods:</b> Tea polysaccharides with different mass fractions were added to the sodium alginate/starch/tea powder composite film to investigate the influence of tea polysaccharides on the properties of sodium alginate/starch/tea powder composite film. Therefore, full infrared barrier, color difference, water solubility, water vapor permeability, tensile strength, elongation at break, thickness, water content, free radical clearance and bacteriostasis were measured. <b>Results:</b> A strong interaction between tea polysaccharides and sodium alginate were found. The composite film with tea polysaccharide content of 5% exhibited the best comprehensive performance. The best bacteriostatic performance was observed when the tensile strength, elongation at break, water vapor permeability were 9.71 MPa, 25.42%, and 2.38×10^-9 g·mm/(cm²·d·Pa), respectively. The antioxidant activity of the composite membrane increased with the increase of the amount of tea polysaccharide added, with a maximum of 85.49%. <b>Conclusion:</b> Tea polysaccharides can improve physicochemical properties, antibacterial and antioxidant properties of the composite membrane. When the mass fraction of tea polysaccharides was 5.00%, the composite membrane had the best mechanical, moisture, and antibacterial properties.