The invention relates to a perforating installing and positioning device and method for a large member, and belongs to the relevant technical field of hoisting equipment. The device majorly comprises an outer ring of a detachable structure; the inner side of the outer ring is fixedly connected with guide rods; each guide rod is sleeved with an elastic part capable of moving along the guide rod; one end of each elastic part makes contact with an aligning part; the other end of each elastic part makes contact with a positioning sleeve installed on the corresponding guide rod; each aligning part is provided with an aligning groove used for containing a steel bar; and the aligning parts are matched to enable the axes of the steel bars to coincide with the axes of installing holes to complete installing and positioning of the member. According to the perforating installing and positioning device and method for the large member, accurate perforating installing of the member can be achieved by designing the brand-new structure.