Limiting stop block of surface grinding machine

The utility model provides a limiting stop block of a surface grinding machine, which comprises a stop block body and an auxiliary device which is arranged on the stop block body and is used for increasing the contact area with the periphery of a component when the stop block body is attached to the periphery of the component, the auxiliary device comprises at least one extension block which is arranged on the stop block body and located on the section in the width direction of the stop block body, the section, close to the annular component, of the extension block is in an arc shape, and when the stop block body is attached to the periphery of the component, the contact area of the stop block body and the periphery of the component is increased through the auxiliary device. Therefore, the friction force between the stop block body and the part is increased, the part is prevented from rotating easily in the polishing process, and the polishing effect of the part is good. 本实用新型提供一种平面磨床的限位挡块，包括挡块本体，还包括设置于所述挡块本体