The invention discloses a hole arrangement way for a foundation slab of an underground construction and an application thereof. The hole arrangement way is characterized by comprising the steps of vertically arranging a sleeve with a switch valve on the foundation slab, fixing the sleeve, forming a through hole penetrating through the foundation slab and penetrating into a soil body below the foundation slab in the sleeve and then closing the switch valve; water drainage and pressure reduction or grouting reinforcement can be carried out below the foundation slab through the hole arrangement way. The hole arrangement way has the advantage of being simple; by forming the hole in the sleeve with the switch valve, underground water is prevented from gushing after the foundation slab is drilled; the water drainage and pressure reduction operation and the grouting reinforcement construction can be carried out below the foundation slab through the hole arrangement way.