The invention relates to an inserting type prefabricated component stacking support and a mounting and using method thereof and relates to the technical field of building construction. The problems that the number of prefabricated components which can be contained by an existing stacking support is limited, so that the prefabricated components cannot be stacked in a large area mode, and stacking is unsafe are solved. The inserting type prefabricated component stacking support comprises a base and a positioning frame fixed to the top of the base, the base comprises a first transverse rod and asecond transverse rod which are parallelly arranged in a spaced mode and further comprises a plurality of inverted-T-shaped supports perpendicularly and fixedly connected between the first transverserod and the second transverse rod, and the second transverse rod is fixedly connected with the ground. The positioning frame comprises a plurality of positioning longitudinal rods which are horizontally arranged and perpendicularly and fixedly connected to the first transverse rod, and the distance between every two adjacent positioning longitudinal rods is larger than the thickness of the prefabricated components. The mounting method comprises the steps that the multiple inverted-T-shaped supports and supporting vertical rods are welded to the second transverse rod; a steel plate is welded tothe top ends of the supports and the supporting vertical rods, and the first transverse rod is welded to the steel plate; and the multiple positioning longitudinal rods are perpendicularly welded tothe first transverse rod, and the distance between every two adjacent positioning longitudinal rods is made to be larger than the thickness of the prefabricated components.