Cement underground storage tank

The utility model provides a cement underground storage tank. Comprising a tank body, a connecting mechanism is arranged on the surface of the tank body, the connecting mechanism comprises a first fixing block installed on the surface of the tank body, a second fixing block is installed on the surface of the tank body, a second fixing hole is formed in the surface of the connecting block, and fixing pins are slidably connected into the first fixing hole and the second fixing hole. According to the cement underground storage tank provided by the utility model, the device is provided with a connecting mechanism, in the using process of equipment, because the tank body is composed of multiple stages of small tank bodies, the tank body needs to be assembled to be used before being used, firstly, the two groups of small tank bodies are in butt joint, so that the two groups of tank bodies are installed and fixed; and then fixing pins penetrate through the first fixing blocks and the connecting blocks through the fi