Rolling axial locating device

Disclosed is a rolling axial locating device. The rolling axial locating device comprises a locating wheel, a supporting rod, a supporting frame, a pressing plate, a bottom plate and a threaded connecting rod. The locating wheel is a bearing and fixedly installed at the top end of the supporting rod. The bottom end of the supporting rod is fixedly installed on the supporting frame. The supporting frame and the pressing plate are respectively provided with a through hole and are fixedly connected, and the two through holes are coaxial after the supporting frame and the pressing plate are fixedly connected. The lower end face of the pressing plate makes contact with the upper surface and the inner side surface of a machine tool guide rail. The threaded connecting rod penetrates through the through hole in the supporting frame and the through hole in the pressing plate. The upper end of the threaded connecting rod is fixed to the upper end face of the supporting frame through a nut, and the lower end of the thre