The invention relates to an oiling device, in particular to a bearing oiling device. The bearing oiling device has the advantages that a bearing can be tightly pressed, the bearing can be oiled, lubricating oil on the surface of the bearing can be uniformly applied, and mistaken collision can be prevented. The bearing oiling device comprises a bottom plate, a bracket, an oil injection assembly anda clamping assembly, wherein the support frame is arranged on the top of the bottom plate; the oil injection assembly is installed in the middle of the top of the bottom plate and is connected with the bracket; and the clamping assembly is installed on one side, which is away from the bracket, of the top of the bottom plate, and the clamping assembly is connected with the oil injection assembly.The oil injection assembly, a clamping device, a rotary assembly, a stop rod, a stop block and a sixth spring are used cooperatively, so that the bearing oiling device has the effects that the bearingcan be tightly pressed, lubricating oil is injected into the bearing, the lubricating oil on the surface of the bearing is uniformly rotated, mistaken collision can be prevented so as not to waste the lubricating oil, the lubricating oil on the surface of the bearing is uniform, people can conveniently inject oil into the bearing, and the condition that the lubricating oil is not applied to somepositions is avoided.