The invention discloses a protection structure and a construction method for excavation of a crushing section of surrounding rocks of a shallow buried and unsymmetrical loading tunnel, and belongs tothe field of tunnel engineering. The protection structure for the excavation of the crushing section of the surrounding rocks of the shallow buried and unsymmetrical loading tunnel includes anti-slidepiles, a grouting reinforcement connecting beam, an oblique beam and micro piles; the anti-slide piles are arranged at equal intervals in the wiring direction along both sides of a excavation profileof a tunnel; the grouting reinforcement connecting beam passes through the anti-slide piles of a shallow buried side and a mountain in sequence, and both ends of the grouting reinforcement connectingbeam are separately connected with the anti-slide piles at both sides of the tunnel; the oblique beam is arranged along a slope, and both ends are separately connected with pile blocks of the anti-slide piles of a deep buried side and the shallow buried side; and the tunnel is excavated within an area enclosed by the anti-slide piles and the grouting reinforcement connecting beam, and the micro piles are arranged to reinforce the bottom of the tunnel and are used as a tunnel lining. According to the protection structure and the construction method for the excavation of the crushing section ofthe surrounding rocks of the shallow buried and unsymmetrical loading tunnel, the protection structure is formed before the tunnel is excavated, the stability of the mountain slope at the side surface of the tunnel can be significantly improved, the unsymmetrical loading force is balanced, and slippage and vault caving are effectively prevented in the shallow buried and unsymmetrical loading tunnel in the excavation process.