1, frozen in the refrigerator, can be stored for about one year. First, soak the silkworm chrysalis in salt water for about 1.20 minutes. Salt water has the function of disinfection and sterilization, then the surface moisture is wiped off, completely sealed with plastic wrap, and finally stored in the freezer of the refrigerator. This method can preserve silkworm chrysalis for about one year.

2. Silkworm pupae can be preserved for about two years if they are vacuumed by vacuum equipment and then frozen.