Deep groove ball bearing with split cage

A deep groove ball bearing with a split cage, comprising an outer ring, an inner ring, a cage, and steel balls, wherein the cage is arranged between the outer ring and the inner ring, the cage is split into an upper frame body, a bearing frame, and a lower frame body, pocket grooves configured to accommodate the steel balls are formed in the bearing frame at intervals, the bearing frame is provided with a connecting piece between any two adjacent pocket grooves, a first insertion groove is formed in an outer wall of the connecting piece, a second insertion groove is formed in an inner wall of the connecting piece, a connecting groove is formed in a bottom surface of each of the pocket grooves, an oil storage cavity is formed in the upper frame body, an opening of the oil storage cavity is arranged toward the connecting groove, the oil storage cavity is provided with oil storage cotton, the oil storage cavity is provided with a positioning flange in a circumferential direction of the opening, the positioning flange is in insertion fit with the connecting groove to form a fixed connection between the upper frame body and the bearing frame, the lower frame body is provided with arc-shaped grooves at positions corresponding to the pocket grooves, each of the arc-shaped grooves and each of the pocket grooves are combined to form a pocket hole, a connecting seat is formed between any two adjacent arc-shaped grooves on the lower frame body, a first insertion member and a second insertion member are arranged on the connecting seat, a clamping gap is formed between the first insertion member and the second insertion member, the first insertion member is in insertion fit with the first insertion groove, the second insertion member is in insertion fit with the second insertion groove, ends of the first insertion member and the second insertion member pass through the bearing frame and form positioning members, the upper frame body is provided with positioning holes at positions corresponding to the positioning members, and each of the positioning members is in insertion fit with each of the positioning holes.