Sizing device of pipe making machine

The invention relates to a sizing device of a pipe making machine. The pipe sizing device solves the problem that a pipe sizing device in the prior art is difficult to flexibly adjust the position of a sizing axis. The device comprises assembling frame bodies which are symmetrically arranged, the assembling frame bodies are provided with horizontal sizing and pipe measuring assemblies used for conducting sizing and pipe measuring on a pipe fitting in the horizontal direction, and the horizontal sizing and pipe measuring assemblies conduct measuring roller height adjustment through a movable adjusting mechanism. Vertical sizing pipe measuring assemblies used for conducting sizing pipe measuring on the pipe fitting in the height direction are arranged on the upper side and the lower side of the horizontal sizing pipe measuring assembly, and the vertical sizing pipe measuring assemblies are driven by a lifting driving mechanism. The sizing device has the advantages that the sizing axis is adjusted according to d