The invention discloses a cab fixing structure of a self-dumping truck for mines. The cab fixing structure comprises a base, a fixing support frame, an upper rubber support block, a lower rubber support block and a press plate, wherein the base is provided with a plurality of square holes, the square holes are in L-shaped arrangement, an L-shaped stop opening is arranged in the fixing support frame, and the upper rubber support block, the base, the lower rubber support block and the fixing support frame are sequentially arranged under the press plate and are connected into a whole with the press plate through screw bolts, screw nuts and gaskets. The cab base is arranged between the two rubber support blocks, so the shock absorption effect is respectively realized during the vertical moving, in addition, the total thickness of rubber is very great, and the shock absorption effect in the vertical direction is obvious. Meanwhile, rubber pads are designed, so the screw bolts are not in direct contact with the base, the generation of rigid impact is prevented, and the shock absorption is stilled realized in the horizontal direction. The cab fixing structure has the advantages that when the L-shaped stop opening is in direct contact with the lateral surface of the base, the auxiliary position limiting effect can be realized, the shearing force born by the screw bolts is reduced, and the service lives of the screw bolts are prolonged.