Penetrating type drainage tube

The invention discloses a through type drainage tube which comprises a connecting tube, one end of the connecting tube is connected with a drainage tube, at least three supporting strips with approximately triangular sections and outward bottom edges are arranged outside the drainage tube, a drainage groove is formed between every two supporting strips, and a plurality of drainage holes are formed in the bottom of each drainage groove in the length direction of the drainage groove. Each drainage groove is slidably connected with a plurality of hole blocking strips used for blocking the drainage holes, and a conical drill bit is arranged at the end, away from the connecting pipe, of the drainage pipe. According to the invention, long-term retention and through drainage can be realized, anaerobic bacteria can play a role in environmental inhibition, the contact area is large, the drainage is sufficient, and dead space is not easy to cause. 本发明公开了一种贯穿式引流管，包括连接管，连接管的一端连接有引流管，引流管外设置有至少三条截面近似呈三角形且底边朝外的支撑条，每两支撑条之间均形