The invention relates to a dog bone piece structure, a dog bone drilling jig mechanism and a drilling method of the dog bone piece structure, and belongs to the field of automobile parts. A dog bone piece body of the dog bone piece structure comprises a dog bone head portion, a rod path and a dog bone tail portion, and the dog bone head portion, the rod path and the dog bone tail portion are connected. The dog bone drilling jig mechanism comprises a drilling jig baseplate, a round hole positioning mechanism, an axial rod path positioning mechanism and a drilling head positioning plate, the round hole positioning mechanism, the axial rod path positioning mechanism and the drilling head positioning plate are arranged on an upper surface of the drilling jig baseplate, a central hole is formed in the round hole positioning mechanism, a v-shaped groove is formed in the axial rod path positioning mechanism, and a limiting hole and a limiting groove are formed in the drilling head positioning plate. The invention further provides a dog bone drilling method which is convenient to operate. The dog bone piece structure and the dog bone drilling jig mechanism are simple and reasonable in designs, low in cost, safe, reliable, convenient to operate and applicable to batch production.