The utility model discloses a groove rail grinding device, including power package and job bank, the car frame body of job bank and power package's car frame body are connected through articulating, are equipped with two sets of units of polishing on the car frame body of job bank, and every group polishes the unit and includes two heads of polishing, and power package's car frame body's lower part is equipped with two sets of power package wheel pairs, and the car frame body's of job bank lower part is equipped with two sets of job bank wheel pairs. Be equipped with slewing bearing between power package's the two sets of wheel pairs of car frame body and front and back respectively, be equipped with rotation mechanism between the car frame body of job bank and a set of wheel pair wherein, the wheel pair is by motor drive, and it is right that another group's wheel pair is the follower. It is groove rail grinding device's drive unit still to be equipped with generating set and frequency conversion unit on power package's the car frame body. The car frame body of job bank still is equipped with electric appliance cabinet, pneumatic station, hydraulic power station, operation panel, dust collection system, the car frame body of job bank with it is equipped with the slope pneumatic cylinder to polish between the unit. Can revise the wavy wearing and tearing of track, the scotch of wheel rail of grider rail and stock rail, carry out the preventive maintenance of complicated circuit rail, sexual valence relative altitude, maintenance cost are hanged down. Controllable slide, simple structure and low cost.