The invention discloses a bare concrete waffle slab structure in-hole early form removal construction method. After hoisting of waffle slab unit blocks is finished, a cast-in-situ belt is reserved between two prefabricated waffle slabs, waffle slab preformed holes are formed in the cast-in-situ belt, and the specification and the distribution of the waffle slab preformed holes are in consistence with the prefabricated waffle slabs. After hoisting of the prefabricated waffle slabs is finished, rebars in preformed grooves are bound, a cast-in-situ preformed slab in-hole form is erected, then the cast-in-situ belt concrete is poured, and the in-hole form is removed after the concrete has certain intensity. The bare concrete waffle slab structure in-hole early form removal construction method is convenient to construct, and good in construction quality.