Harness protection device, corresponding gearbox of motor vehicle and motor vehicle

The utility model provides a harness protection device, a corresponding gearbox of a motor vehicle and the motor vehicle. The harness protection device comprises a strip groove body formed by extension along a U-shaped section in a fold line form, orientations of openings of two portions, on two sides of a turning point of the fold line, of the strip groove body are intersected, a clamping base extending in a direction parallel to the bottom of the groove is integrally connected with the outer side of the side wall of the strip groove body, and a clamping direction of a clamping element matched with the clamping base is perpendicular to the clamping base and parallel to a plane of the strip groove body. The harness protection device is fixed onto a target mounting part by a fastener parallel to a plane where the harness protection device is positioned, wide application range, low manufacturing cost and high assembly efficiency are achieved, and the harness protection device is applicable to fixation of harnesses to other articles with mounting holes, such as gearboxes of motor vehicles.