Shield segment with high stability

The high-stability shield segment comprises a first segment body and a second segment body, a first inserting plate and a second inserting plate are arranged on the first segment body, a first inserting groove, a second inserting groove, a main through hole and a countersunk groove are formed in the second segment body, reinforcing plates are arranged on the outer wall face of the first segment body and the outer wall face of the second segment body, and stabilizing inserting heads and screw grooves are arranged on the reinforcing plates. The stable plug is provided with barbs, a main screw rod is inserted into the main through hole, a screw rod cap is arranged on the main screw rod, and a lock washer and a dustproof plug are arranged in the countersunk head groove. The overall connection stability between shield segment connection parts and between the outer wall face and the soil layer wall face is improved, the countersunk head groove with the dustproof plug is formed in the inner side wall of the segment,