The work aims to determine the better coupling agent and its dosage to improve the properties of polyethylene film. The talc powder was modified by aluminate, titanate, stearic acid and other coupling agents. The modified talc powder was evaluated by measuring its’ contact angle, activation rate and FTIR. The modified talc powder was blended with polyethylene and blown into film and the mechanical properties of the films were measured. The surface of talc powder modified by coupling agent changed from hydrophilicity to hydrophobicity, and the surface modification effect of titanate was better. Surface modification improved the mechanical properties of talc powder filled polyethylene films. When talc powder modified by 2% titanate is used as powder, the comprehensive properties of polyethylene film are better.