Zokor—Myospalax psilurus,which are typical soil-burrowing animal,live primarily underground and highly adapted to that environment.The zokor were chosen as the research object in this work.The geometrical characteristic of middle toe of fore claw of zokor was examined by stereo microscopy.The excavating activities of zokor were observed using HD camera.The contour feature of middle toe of fore claw of zokor was extracted using digital image-processing functions in MATLAB software,the equations of contour curves of the middle toe of fore claw were obtained and,then then,the curvature of the curves was calculated and analyzed.