The utility model discloses a tail cutting positioning device for sealing the tail of a special-shaped hose, which comprises a cam, a positioning clamp, a cutter and a cam rod, wherein the cam is arranged above the cutter; the positioning clamp is arranged under the cutter; the cam rod is matched and connected with the cutter; and the cam is matched and connected with the cam rod. The tail cutting positioning device solves the problems in the prior art that the tail cutting deviation is large, the tail cutting positioning rejection rate is higher, the manual waste is greater and the production efficiency is low, and has the characteristics that the structure is reasonable, the cost is low, the tail cutting deviation is avoided basically, the qualification rate is high, the production efficiency is high and labor is saved.