Pleural effusion drainage device

The invention provides a pleural effusion drainage device which comprises a puncture cannula, a puncture needle, a drainage tube set, a first connection part and a drainage bottle. The drainage tube set comprises a first drainage tube and a second drainage tube, and one end of the puncture cannula is provided with a first blocking body. The puncture needle is provided with a second blocking body and a puncture handle, and the second blocking body on the puncture needle is matched with the first blocking body on the puncture cannula, so the puncture cannula can be fixed to the puncture needle, and the puncture handle is convenient to operate during an operation. The puncture cannula is arranged at the end, far away from the puncture handle, of the puncture needle in a sleeved mode, one end of each drainage tube penetrates through the first blocking body and is connected to the puncture cannula, and the other end of each drainage tube is connected with the first connection part and the drainage bottle in sequence. Hydrops and pneumatosis in a pleural cavity of a human body are discharged through the first connection part, the hydrops and pneumatosis which are discharged out of the body are collected in the drainage bottle through the drainage tubes, testing, metering and processing are facilitated, the puncture cannula is easy to fix after puncture, operation is easy, trauma is small, flow speed can be adjusted, pain of patient can be relieved, and safety performance is good.