Rainwater purification processor

A water inlet and a water outlet are formed in a shell, the water inlet and the water outlet are arranged in the tangential direction of the shell, and the water outlet is located above the water inlet; the sludge settling chamber is arranged in the shell, the sludge settling chamber is of a hollow structure with a closed bottom surface and an opening in the top surface, the opening in the top surface of the sludge settling chamber is an inwards-sunken horn mouth, and the horn mouth is located below the water inlet; the filter element is arranged in the shell and located between the water inlet and the water outlet. The device does not need extra power, is natural and environment-friendly, the filtering speed is increased along with the liquid level pressure difference, and natural flow does not consume energy; the filter material in the filter element can be pertinently configured according to different environment scenes; the device has isolation and precipitation effects on floating objects in rainwater, c