Positioning method for reserved holes of pipelines of multi-storey building

The invention provides a positioning method for reserved holes of pipelines of a multi-storey building, and relates to the technical field of building engineering. The specific construction method comprises the steps that the mounting positions of the vertical pipelines are determined on the upper surface of a floor slab on the bottommost layer of the building, and laser transmitting modules are arranged at the mounting positions; in the formwork erecting process of a floor slab on the second storey, laser receiving modules are fixed to reserved areas, and lasers are transmitted through the laser transmitting modules, so that the laser receiving modules generate position marks which conform to the mounting precision and are in the shapes of embedded sleeves of the reserved holes of the pipelines; the embedded sleeves are placed at the position marks, and the formwork erecting procedure of the floor slab on the second storey is completed; concrete is poured, formwork removal is conducted, and the reserved hole