Water tank assembly and environmental sanitation equipment with same

The water tank assembly comprises a tank body and a first partition plate, a first water storage cavity and a second water storage cavity are defined in the tank body, the second water storage cavity is communicated with the bottom wall of the first water storage cavity, a water outlet is formed in the bottom wall of the second water storage cavity, and in the first horizontal direction, the second water storage cavity is communicated with the first partition plate. The second water storage cavity is shorter than the first water storage cavity; the multiple first partition plates are arranged in the second water storage cavity and arranged in the circumferential direction of the water outlet at intervals, and at least part of each first partition plate is located on the radial outer side of the water outlet. According to the water tank assembly, the second water storage cavity is matched with the first partition plate, so that vortex can be effectively prevented from being generated at the water outlet when t