Grinding tool

The utility model provides a grinding tool, relates to the technical field of grinding, and aims to solve the problems that the lower end of an existing machined product needs to be stably clamped due to the fact that the existing machined product needs to be ground, otherwise, the product deviates or inclines when being stressed during grinding, and the height of the product needs to be adjusted during grinding, so that the grinding efficiency is high. The product surface grinding device comprises a working table. Vertically downward supporting columns are fixedly mounted at four corners of the bottom of the worktable; and a through processing barrel is fixedly mounted in the middle of the workbench. When a product needs to be ground, the lower end of the product can be fixedly clamped by the two limiting plates, the product cannot deviate when being stressed during grinding, the fixedly clamped product can stably slide up and down, the position of the product can be adjusted up and down, the product can be