Self-cleaning filter is a kind of water treatment equipment that uses the filter screen to directly intercept impurities in the water, remove suspended matter and particulate matter, reduce turbidity, purify water quality, reduce system dirt, bacteria and algae, rust, etc., in order to purify water quality and protect the normal work of other equipment in the system. It has the function of filtering raw water and automatically cleaning and discharging the filter element, and the uninterrupted water supply system can monitor the working status of the filter, with a high degree of automation.