Medical double-backflow filter for infusion set

The invention discloses a medical double-backflow filter for an infusion set, and relates to the technical field of the infusion set. The medical double-backflow filter comprises a lower casing, an upper cover and a filter membrane body, wherein one surface of the upper cover is fixedly connected with one surface of the lower casing, a cushion block is fixed to one inner wall of the lower casing,and a liquid passing port is formed in the cushion block, a through hole is formed in one inner wall of the cushion block and communicates with the liquid passing port, a filter membrane fixing ring is fixed to one surface of the cushion block, and a lower positioning ring is fixed to one surface of the filter membrane fixing ring. A liquid is conveyed to the front of the filter membrane body through a liquid inlet pipe, a downflow channel and a liquid inlet, the liquid moves from bottom to top, and the gas inside the filter is exhausted through an exhaust head, so that bubbles on the front ofthe filter membrane body