Bellows quick connector with arc positioning structure

The utility model discloses a bellows quick connector with an arc positioning structure. The bellows quick connector comprises a bellows, a connector and a connecting block. A butt seal gasket is disposed in a plug hole. The inner wall of a connecting portion is provided with at least two symmetric positioning holes. An end face of the connecting portion is provided with an incoming hole. The connecting portion is internally provided with an arc positioning passage whereby the positioning hole and the incoming hole are communicated, and an arc positioning insert rod which is inserted from the incoming hole. When the connector is connected with the connecting block, the arc positioning insert rod is in contact with the butt seal gasket, under the counteraction of the butt seal gasket, the end of the arc positioning insert rod penetrates the positioning hole and is abutted to a groove of the bellows to fix the bellows, and the end of the arc positioning insert rod and the end of the bellows jointly abut to the butt seal gasket. The bellows quick connector is simple in structure, convenient and quick to use, good in overall sealing performance, safe and reliable to use and highly practical.