The invention discloses a combined bearing with steel ball rolling bodies. The combined bearing comprises a bearing body (1), wherein the bearing body comprises an inner ring (2), a middle ring (3), an outer ring (4), a steel ball rolling body (5), a first retainer (6) and a second retainer (7). The bearing body (1) is provided with an inner ring (2), a middle ring (3) and an outer ring (4) whichare sequentially arranged from inside to outside, a first retainer is arranged between the inner ring (2) and the middle ring (3), a second retainer is arranged between the middle ring (3) and the outer ring (4), and the steel ball rolling bodies are arranged on the first retainer and the second retainer. The combined type bearing with the steel ball rolling bodies is adopted, so that the structural design is reasonable, the use of equipment can be well met, and the rotating speed of the bearing can reach the required rotating speed of equipment. Two bearings are combined together, so that theservice life of the combined bearing is the sum of the service lives of the two bearings, and the speed limit of the combined type bearing is the sum of the rotating speed of the two bearings.