Prearranged hole mould for water supply and drainage pipe of floor slab

The utility model relates to a prearranged hole mould for a water supply and drainage pipe of a floor slab, which comprises a tapered barrel, iron nails and an iron wire, wherein the tapered barrel adopts a hollow truncated cone structure with a bottom at a lower opening, the diameter of an upper opening is larger than that of the lower opening, a positioning hole is arranged in the center of the bottom surface, the tapered barrel is connected with the part among the iron nails through the iron nails on the periphery of the positioning hole and the lower opening of the tapered barrel and is fixed on the horizontal surface across the iron wire on the edge of the upper opening of the tapered barrel, the height of the tapered barrel is 20 mm to 30 mm more than the thickness of the floor slab, the diameter of the upper opening of the tapered barrel is 35 mm to 50 mm more than the diameter of the water supply and drainage pipe, and the diameter of the lower opening of the tapered barrel is 5 mm to 10 mm more than the diameter of the water supply and drainage pipe. Compared with the prior art, the prearranged hole mould has the following advantages: the mould has a simple structure, is accurate and firm to position, is convenient and practical to strip, has good anti-leak effect after the hole is filled, saves labor and time, and improves the working efficiency.