Abstract: The relation between the hot pressing process and the product performance of jute/polypropylene fiber composite plate was studied with focuses on the effect of hot pressing temperature,time and pressure on the mechanical property of the fiber composite plate.And through a special mathematics method,the optimal hot pressing process parameters were found out:temperature,(166.26 ℃;) time,(3.32 min;) pressure,(4.34 MPa.) Through significance examination results,regression equation and correlation chart,it can be seen that as the shaping temperature and time increase,the strength of the fiber composite plate first increases,but then drops.