The invention discloses a shallow-buried excavation construction method for a cataclastic rock subway tunnel intersection. The method includes the following steps that an upper step of the intersection of a body station and an air duct is excavated first, and certain loads are released; then, a lower pilot tunnel is excavated from the air duct to the intersection, and construction is carried out to an end wall; a slotted hole is excavated from the upper step to a lower step of the intersection, and a connector ring beam structure is formed; soil mass of a certain width is excavated in the middle of a middle step of the intersection, a two-lining structure is formed, and the two-lining structure and a ring beam form an overall framework structure; after the two-lining structure is finally set, the soil mass on the other parts of the middle step is excavated, and accordingly an overall structure is achieved. The shallow-buried excavation construction method for the cataclastic rock subway tunnel intersection is widely applied to a large-section intersection tunnel which is shallow in coverage, broken in rock and strict in settlement control, the stable framework structure is formed first, the span impacting effect in large-section construction can be reduced, the settlement deformation of cataclastic rocks can be effectively controlled, and thus the construction safety and the overall stability of intersection tunnels can be guaranteed.