The utility model relates to an antirust rolling bearing, which comprises a bearing steel ball 1, a bearing cage 2, a bearing sealing ring 3, a bearing inner ring 4 and a bearing outer ring 5. The utility model is characterized in that: phosphatized protective layers 41, 51 are respectively arranged on the external surface of the bearing inner ring 4 and the external surface of the bearing outer ring 5. The thickness of each phosphatized protective layer 41, 51 is 0.003-0.008 mm. Compared with the prior art, the utility model has the advantages of improving the antirust performance of the bearing and reducing processing difficulty and manufacture cost.