Improved bent pipe bending device

The invention discloses an improved bent pipe bending device. The device comprises a fixing plate and a support column, a bending assembly, a deviation rectifying assembly, an air bag protecting assembly and an auxiliary positioning assembly which are arranged on the fixing plate, wherein the support column is used for applying supporting force to the upper side of a bending position of a pipe fitting A; the auxiliary positioning assembly is arranged on the lower left side of the support column and used for fixing the position of the pipe fitting A; and the bending assembly is arranged on theright side of the supporting column and used for generating upward thrust on the right end of the pipe fitting A. According to the device, improvements are made aiming at the defects of an existing device, and the defect that the supporting area is reduced when the pipe fitting A is bent is overcome, so that the machining quality of the pipe fitting A is better guaranteed; and the inclination angle of a guide plate can be