The utility model discloses an obstetrical waste liquid collecting device, including collecting subassembly, connecting conduit and storage subassembly, collecting subassembly and storage subassembly through connecting conduit sealed connection, collecting subassembly includes collecting outer cover, the bottom of collecting outer cover is sealed and inserted with the drainage joint of connecting conduit inserted, and the drainage joint is connected with the drainage joint of collecting outer cover. A collecting inner cover is placed at the top of the collecting outer cover and located in the center of the collecting outer cover, an isolation cavity is formed between the collecting outer cover and the collecting inner cover, a plurality of protruding blocks are integrally formed on the inner wall of the collecting outer cover, clamping grooves are formed in the top of the collecting outer cover, and the clamping grooves and the protruding blocks are connected in an embedded mode. According to the utility model, not only can some impurities be filtered, but also liquid can quickly flow into the isolation cavity to avoid splashing; meanwhile, the liquid can be guided into the negative pressure drainage
bottle through the connecting guide
pipe, continuous negative pressure drainage of the liquid is achieved through the spring and the one-way valve, and therefore the risks of liquid gathering and splashing are more effectively eliminated.