The invention relates to the technical field of toilets, in particular to a public toilet, which includes a squatting pan, the middle of the squatting pan is provided with a toilet tank, pedals are arranged on both sides of the toilet tank, one side of the pedal, near the toilet tank, is hinged to the squatting pan, a supporting air bag for storing gas is arranged between the lower side of the pedal and the squatting pan, a water spray pipe is arranged at one side of the pedal, far away from the toilet tank, a blocking air bag is arranged at the inner side of the bottom of the water spray pipe, the blocking air bag is communicated with the supporting air bag, an elastic buffering air bag is arranged at the inner side of the top part of the water spray pipe, the buffer air bag is arranged at one side of the blocking air bag, close to the pedal; one side of the water spray pipe, far away from the pedal, is provided with a bracket, the bracket is provided with a pressurizing water tank, awater injection box and a water storage tank, one end of the water spray pipe, far away from the pedal, is communicated with the bottom of the pressurizing water tank, the upper part of the pressurizing water tank is communicated with the buffering air bag, the top of the pressurizing water tank is communicated with an inflating mechanism, a lever is arranged between the pedal and the bottom of the water injection box. According to the scheme, the problem that, in the prior art, the top surface of the squatting pan is easy to be polluted by trampling is solved.