The invention discloses runner collar grinding equipment, which comprises a support frame I with a hollow base, a lifting and rotation driving device, a grinding component and a grinding liquid adding device. The lifting and rotation driving device consists of a rotation driving device and a lifting device, the rotation driving device is slidably connected with a support frame II, the lifting device is movably connected with the support frame II, the top of an output shaft of the lifting device keeps in touch with the bottom of the rotation driving device, the grinding component consists of a horizontal rotary arm, a grinding plate is slidably connected with the horizontal rotary arm, a working face faces upwards, and a rotary shaft is fixedly connected with the horizontal rotary arm and connected with an output shaft of the rotation driving device by a spline. The runner collar grinding equipment can be used for grinding runner collars of vertical rotary shaft thrust bearings of large-sized equipment including hydroelectric generating sets, large-sized vertical water pumps and the like of hydroelectric power stations, and is suitable for planar grinding of large-sized annular workpieces in fields.