The drying process of wet silkworm chrysalises, which are the subproducts of the silk production industry, is experimentally studied. The mode of forced convection drying with hot air permeating vertically is adopted. The influence of temperature and velocity of the hot air as well as the thickness of the chrysalises layer in the drying process is analyzed on the basis of the experimental results. An experimental relation of exponental model for wet silkworm chrysalises drying process is obtained.