Abstract: The hemp fiber has good properties such as non-itching feeling,hygroscopic and air permeable,antistatic,and shielding ultraviolet radiation.However,its processing still encounters a lot of problems,and the traditional chemical degumming of it is not satisfactory.The effect of high temperature scouring time on the degumming quality of the hemp fiber was analyzed by scanning electron microscopy and strength testing.The result shows that the optimal high temperature scouring time for effective degumming of hemp fiber is about 3 hours.