The invention provides a slag ladle with a trunnion capable of tilting outward and moving. The slag ladle comprises a slag ladle main body, two groups of trunnion assemblies which are respectively arranged on two sides of the slag ladle main body as well as pin shafts, wherein each group of trunnion assembly comprises a connecting seat, and a trunnion arranged in the connecting seat; the pin shafts are arranged in the connecting seats in a penetrating manner; the slag ladle main body is correspondingly and fixedly provided with pin shaft seats at the pin shafts; and each connecting seat is hinged to the corresponding pin shaft seat through the corresponding pin shaft. In the application, the trunnion assemblies are integrally hinged to the pin shaft seats through the pin shafts, so the trunnion assemblies can integrally rotate around the pin shafts, and integrally tilt outward and move in the direction away from the slag ladle main body, and further a diversion device is conveniently added on the slag ladle; and the operation of arranging a gap in the slag ladle main body for avoiding the interference between the trunnion assemblies and the slag ladle main body is avoided, and further the integrity of the slag ladle main body is ensured, and structural strength of the slag ladle main body is ensured.