Composite base layer and floor direct-paving quick-mounting design structure for purifying formaldehyde and mounting method

The invention provides a composite base layer and floor direct-paving quick-mounting design structure for purifying formaldehyde. Firstly, a first ground base layer, a second ground base layer, and afloor layer are arranged; the first ground base layer is laid on the ground; the second ground base layer is laid on the first ground base layer; and the floor layer is laid on the second ground baselayer. The first ground base layer comprises an extruded sheet and gypsum-based self-leveling mortar; the second ground base layer comprises activated carbon particles and the gypsum-based self-leveling mortar; and the floor layer comprises a plurality of buckle connecting parts and a plurality of floor bodies. The buckle connecting parts are fixed to the second ground base layer, and the floor bodies are connected between the buckle connecting parts in a clamped mode. The invention further provides a mounting method of the composite floor direct-paving quick-mounting design structure for purifying formaldehyde. Compar