The invention relates to water supply equipment, in particular to a water tower with a cleaning device. The water tower comprises a water tower box body, a pressurization device, a heating device and a cleanser device, wherein the pressurization device, the heating device and the cleanser device are connected with the water tower box body. A telescopic mechanism is arranged in the water tower box body and internally provided with a high-pressure water pipe. One end of the high-pressure water pipe is connected with the pressurization device. A support electric control device is arranged at the top end of the telescopic mechanism. According to the water tower with the cleaning device, labor intensity of operators is greatly relieved, the operators can conduct the whole sewage discharging process only by opening a sewage discharging valve and pressing a button, and automation is completely reflected. If the heating device and a certain quantity of cleansers are added into the pressurization device, the cleaning effect is better. The water pressure can be changed through the pressurization device to adapt to cleaning intensities in different periods.