The invention discloses a self-moving floor anchor rod drill stabilizing trolley for a coal mine. The trolley comprises an underframe (1), a working part (2), an upper frame (3) and a device positioning part (4); the upper frame is fixedly installed on the underframe; the working part is installed on the underframe and comprises a body (21), a front-back guide groove (22), a front-back positioningflange (23), a left-right guide groove (24), a left-right positioning flange (25), a drilling rig mounting rack (26) and a drilling rig (27); the device positioning part comprises positioning supporting bidirectional telescopic hydraulic cylinders (41) and a control valve bank and pump station (42), and cylinder bodies of the two positioning supporting bidirectional telescopic hydraulic cylindersare vertically and fixedly installed in the middle, in the front-back direction, of the upper frame or the underframe in a bilateral symmetry mode. By means of the self-moving floor anchor rod drillstabilizing trolley for a coal mine, on the premise of providing reverse supporting force in the drilling process, drilling can be rapidly conducted on a tunnel floor, so that the anchor rod mountingspeed is overall increased, and the requirement for rapid tunneling is achieved.