Novel multifunctional cotter pin mounting tool

The utility model relates to the field of devices special for cotter pin installation, in particular to a novel multifunctional cotter pin installation tool which is characterized in that a first limiting guide hole, a second limiting guide hole and a third limiting guide hole are formed in the clamping side of a first tong head; a first guide groove, a second guide groove and a third guide groove are formed in the clamping side of the second tong head; a wedge-shaped protruding structure is arranged between the first guide groove and the second guide groove. The first limiting guide hole and the wedge-shaped protruding structure are oppositely arranged. The second limiting guide hole is opposite to a corner angle on one side of the third guide groove; and the third limiting guide hole is opposite to the third guide groove. When the cotter pin is installed through the cotter pin installation tool, various tools do not need to be matched for operation, the working intensity of operators is effectively reduced,