Water tank capable of adjusting circulation period

The utility model discloses a water tank capable of adjusting a circulation period, which comprises a main water tank, a water inlet pipe arranged at the upper end of the main water tank, a water outlet pipe arranged at the bottom of the main water tank, a closed cavity arranged on one side wall in the main water tank, and a communication switch respectively arranged on the upper end face and the lower end face of the closed cavity. The operation part of the communication switch extends out of the side wall of the main water tank, and water is controlled to enter and flow out of the closed cavity through the communication switch so as to control the volume of water in the main water tank. The volume of water stored in the water tank is adjusted through a simple water tank structure, the purpose of controlling the water circulation period is achieved, and convenience and safety of water consumption of residents are guaranteed. 本实用新型公开一种可调节循环周期的水箱，其包括一主水箱，主水箱的上端设有进水管，主水箱的底部设有出水管，进水管通过连接浮球止水阀向主水箱供水，主水箱内的一侧壁上设有密闭