Laminated slab reserved hole pipeline fixing device

The utility model relates to the field of building construction, in particular to a composite slab reserved hole pipeline fixing device which comprises a fixing plate, multiple sets of sleeves and a positioning plate, the fixing plate is installed at the bottom of a composite slab reserved hole and used for sealing the reserved hole, the multiple sets of sleeves are correspondingly installed in multiple installation holes formed in the fixing plate, and the positioning plate is used for positioning the composite slab reserved hole. The positioning plate is installed on the fixing plate and fixedly connected with the multiple sets of sleeves, grooves matched with the outer walls of the sleeves are formed in the positioning plate, the multiple sets of pipelines are sequentially inserted into the corresponding sleeves, concrete is poured into the holes of the laminated slab, and before the concrete is completely solidified, the positioning plate is taken out, so that the multiple sets of pipelines are fixed to t