Domestic sewage purification treatment device

The utility model provides a domestic sewage purification treatment device which comprises a water tank, a refining mechanism is arranged in the water tank, the refining mechanism comprises a first connecting pipe, the bottom of the first connecting pipe is connected with a second connecting pipe, and the top of the second connecting pipe is connected with a convex ring. A connecting rod is connected to the interior of the second connecting pipe, mincing blades are connected to the top of the connecting rod, a filter cartridge is connected to the bottom of the second connecting pipe, fixing blocks are connected to the outer sides of the first connecting pipe and the second connecting pipe, and a limiting disc is connected to the outer side of the first connecting pipe. According to the domestic sewage purification treatment device provided by the utility model, the problems that in the sewage treatment process, a large amount of solid garbage exists in domestic sewage, and in the domestic sewage conveying pro