Abstract: For preparing the grafted fabrics with excellent wearability and biocompatibility，hydrolysis polyacrylonitrile fabrics were grafted with chrysalis protein by cross linking having soft function-sucrose fatty acid ester glycidyl ether（SFEGE）.The structure features of the polyacrylonitrile fiber were observed and measured by SEM, X-ray diffraction and DSC. The wearability of the grafted fabrics was analyzed too. The SEM photo showed that the fiber grafted with chrysalis protein was covered with membrane; X-ray diffraction revealed that the structure of the fiber grafted with chrysalis protein did not change much; DSC exhibited that the thermal stability of grafted chrysalis protein fiber has little alternation. The test of wearability indicated that the elasticity 、softness and moisture permeability grafted polyacrylonitrile fabrics still kept well, and the hygroscopicity property and the air permeability were improved.