The utility model discloses a -in -place mould for concreting construction, -in -place mould includes first glass magnesium board, waffle slab and second glass magnesium board from inside to outside, and type of being cuboid structure, still includes: four at least mountings, to arbitrary mounting, it connects type of constitution T type structure by the body of rod and plate body, wherein the body of rod of mounting passes perpendicularly on second glass magnesium board, waffle slab and the first glass magnesium board in proper order, face that plate body and the body of rod are connected with the medial surface laminating of first glass magnesium board is fixed, the thickness of plate body does 14~16 of first glass magnesium plate thickness. The utility model has the advantages of non -deformable can give sound insulation.