The invention relates to an improved structure of water smoke insecticide, which comprises a first container with an opening, a medicine can placed in the first container, and a pull ring cover arranged at the opening of the first container. Therefore, the design of the pull ring cover is used to achieve better sealing and moisture-proof effect. When the user wants to use the pull ring cover, he can easily open it by pulling it.本創作為一種水煙式殺蟲劑改良結構，其包括：一第一容器，具有一開口；一藥劑罐，放置於該第一容器內；以及一拉環蓋，設於該第一容器之開口處。藉此，利用拉環蓋的設計，以達到較佳的密封及防潮效果，且當使用者欲使用時，只需拉起該拉環蓋即可輕易開啟。
