A project work on study on various pest of eri and mulberry silk worm has been carried out during January 2019 to May 2019. The report reveals that rearing of silkworms is important to study the pest of silkworm. Pest is an organism who harm the economically productivity of other organism. Silkworms are larvae of silk moths that produce silk threads. Pests of silkworms are parasitoid organisms. Pest’s management is important to productivity of silk threads crops.