Backwash pipeline filter

The utility model provides a backwashing pipeline filter which comprises a barrel body, the barrel body is in a three-way pipe shape, a water outlet and an outlet flange are arranged at the upper end of the barrel body, a water inlet and an inlet flange are arranged on one side of the barrel body, a connecting flange and a flange blind plate are arranged on the other side of the barrel body, a fixed screen plate is arranged on the inner wall of the barrel body at the water inlet, and a conical filter screen is arranged on the fixed screen plate. A circular ring is arranged at the edge of the conical filter screen and is connected with the fixed screen plate through a screw, a filter screen handle is arranged on the conical filter screen, the end part of the conical filter screen is clamped in a filter element clamping ring, the filter element clamping ring is arranged on one side of the flange blind plate, a drain outlet and an emptying port are formed in the other side of the flange blind plate, and the drai