The invention relates to a bumper mounting structure with a mounting direction changing function. The bumper mounting structure comprises a bending part, wherein the connecting part is used for connecting a front bumper of an automobile and a connecting sheet, and a glue reducing groove is formed in the front surface or the back surface of the bending part. The bumper mounting structure has the advantages that by forming the glue reducing groove in the root part of the connecting sheet of the bumper, the bending part can be bent and formed through the glue reducing groove, so the breakage of the connecting sheet is avoided in the bending process; when a mold is manufactured, the processing is performed according to the data of a demolding state, and the demolding is guaranteed; in the mounting process, the connecting sheet is bent into the mounting state and then is mounted; the cost of the mold is reduced, the processing difficulty of the mold is decreased, the design and mounting difficulty of a product is not increased, and the smooth mounting of the front bumper is guaranteed.