The invention discloses a method for producing silk mask base cloth through cocoons. The method comprises the following steps that (1), cocoon washing is performed, namely, the cocoons are washed with clean water to remove dust and debris; (2), wetting is performed, namely, the washed cocoons are soaked in water to be sufficiently wet; (3), alkali soaking is performed, namely, the wet cocoons are evenly placed in a steaming barrel, and alkali water which can right wet the cocoons is sprayed on the cocoons so that the cocoons can be wet again; (4), steaming is performed, namely, the cocoons are steamed with steam so that sericin can be completely swollen; (5), washing is performed, namely, the steamed cocoons are washed with clean water; (6), cocoon peeling is performed, namely, pupas are peeled off; (7), the cocoons with the pupas peeled off are made into arc-shaped silk net films; (8), the silk net films are bleached, neutralized with a glacial acetic acid solution, dried and finally stamped to form the silk mask base cloth. By means of the method, the activity of the sericin can be maintained to the maximum degree. The technological process is simple, the nutrients of silk can be sufficiently utilized, and the silk mask base cloth is a pure natural skin-whitening, moisturizing, anti-wrinkling and UV-resisting product.