The effect of MAPP/EAA treatment on the properties of polypropylene/wheat straw powder composites was studied. Maleic anhydride grafted polypropylene (MAPP), ethylene acrylic acid copolymer (EAA) treatments on polypropylene (PP)/wheat straw powder (WSP) were studied. The impact of composite material properties. The results show that with the increase of the mass fraction of MAPP in the system, the tensile strength and flexural strength of PP/WSP gradually increase, but the impact strength first increases and then decreases, and the time for the composite material to reach the plasticization peak gradually increases; After using EAA, regardless of whether MAPP has been used in the system, the tensile, bending and impact strength of PP/WSP can be improved. Especially for the system without MAPP, the effect is more obvious, which can be increased by 65.04%, 45.42% and respectively. 6.75%, storage modulus increased, surface hydrophobicity increased, balance torque decreased from 13.9 N·m to 11.8 N·m, water absorption size change rate and water absorption rate decreased, water absorption balance time shortened; use of EAA can improve PP/WSP The interface combination between WSP and PP improves the mechanical properties, thermal stability, surface hydrophobicity, dimensional stability and processing properties of PP/WSP, and reduces its water absorption.