Purifying and filtering device for sewage treatment

A purifying and filtering device for sewage treatment relates to the field of machinery and comprises a treatment box, a filter material is arranged in the treatment box, a siphon water outlet pipe is arranged on one side of the treatment box, one end of the siphon water outlet pipe is inserted into the filter material, the other end of the siphon water outlet pipe extends to the outside, and a diversion channel is arranged on the outer side of the treatment box. The water outlet end of the siphon water outlet pipe is located over the flow guide channel, the treatment box is connected with a sewage pipe, and a filtering and impurity removing mechanism is arranged above the treatment box. According to the utility model, sewage purification treatment can be realized by virtue of various filtering materials, impurities on the surface of the filtering plate can be removed by virtue of the filtering and impurity removing mechanism, and automatic impurity removal is realized by virtue of the scraping plate and the