The invention belongs to the field of building steel structure construction, and particularly relates to a method for lifting and turning a large steel member. Before lifting, the large steel member is placed horizontally in a yard. When the large steel member is placed, a steel stirrup bracket is placed at the top of the large steel member, and a trolley bracket is placed at the bottom of the large steel member; a crane hook starts to lift vertically, and a top lifting point of the large steel member is vertically lifted and separated from the steel stirrup bracket; meanwhile, as the large steel member is lifted and turned, the trolley bracket gradually moves horizontally forwards with the bottom of the large steel member in the lifting process; the crane hook continues to vertically liftthe top lifting point of the large steel member; and meanwhile, the trolley bracket supports the bottom of the large steel member and continues to move horizontally forwards until the large steel member is turned into a vertical state to complete the turning. According to the method for lifting and turning the large steel member, the situation that the bottom is in contact with the ground when the large steel member is lifted by using a single crane can be effectively avoided, and the lifting efficiency is high; and meanwhile, the investment in large lifting equipment during the lifting process can be reduced, and the cost is reduced.