The invention belongs to the technical field of application of filter accessories, and particularly discloses a shell structure for a filter and a production method thereof. The shell structure consists of a shell body and a shell cover, and has the beneficial effects that 1, the shell structure has a rational and simple structure and is convenient to mount and maintain, the production process is simple, the production efficiency is high, a high-performance aluminum alloy material is adopted, and the filter shell structure integrally manufactured by the material has a stable structure and is long in service life, 2, produced heat is transmitted through the rectangular shell and is dissipated efficiently by using first and second radiating fins, and third and fourth radiating fins on the shell cover respectively to prevent over-high internal temperature and damage to components in the filter when the components of the filter work, and 3, a concave connecting groove is formed in a positioning junction of the shell and the shell cover to achieve an effect of facilitating mounting and heat dissipation. Meanwhile the production cost is low and the popularization is easy.