Manufacturing process and application of long-effect cockroach killer

The present invention provides a kind of insecticide which can be applied on the surfaces of various articles-long-acting cockroach-killing agent and its preparation method and application. Its formulation consists of pyrethrin, high-molecular film-forming slow-releasing agent, synergist, acetone and ethyl alcohol. The cockroach-killing agent made by use of given preparation process is sun-proof and wash-proof, does no harm to human body and does not contaminate environment. Its cockroach-killing effect is notable and once-used effective time can be up to more than 6 months.