Reducing pipe grinding device

The utility model relates to the technical field of polishing devices, in particular to a reducing pipe polishing device which comprises a base, a first fixing plate and a second fixing plate are fixedly installed at the two ends of the top of the base respectively, and a positioning mechanism is installed on the first fixing plate to fix a reducing pipe. And a polishing mechanism is mounted on the second fixing plate so as to polish the inner wall of the reducing pipe. The grinding mechanism can grind the inner wall of the reducing pipe in a large range, and the grinding efficiency can be greatly improved. 本实用新型涉及打磨装置技术领域，尤其是一种异径管打磨装置，包括底座，底座顶部的两端分别固定安装有第一固定板和第二固定板，第一固定板上安装有定位机构、以对异径管的进行固定，第二固定板上安装有打磨机构、以对异径管的内壁进行打磨。本实用新型可以使得打磨机构可以对异径管的内壁进行大范围打磨，也就可以大大提高打磨效率。