The invention provides a throttling type body fluid drainage tube. An internal source nipple is formed in one end of the drainage tube, the port is connected with an external source nipple of a remaining needle, the portion, on the rear sides of the source nipples, of the drainage tube is connected with a drip tube, and the portion, on the rear side of the drip tube, of the drainage tube is provided with an adjustor. The throttling type body fluid drainage tube is connected with the external source nipple of the remaining needle through threads, and a conical connector of a body fluid drainage bag can be inserted into an inner hole in the tail end of the drainage tube. The drip tube is arranged on the drainage tube so that the flow speed of body fluid can be conveniently observed according to the drip speed of fluid drops. The adjustor is arranged on the drainage tube, the release speed of the body fluid is adjusted, various complications caused by the over high flow speed of the body fluid are avoided, and medical risks of patients are reduced.