The utility model discloses an interior support supporting construction, including a bottom plate and a fender pile, be provided with ground frame roof beam on the bottom plate, be provided with the bracket on ground frame roof beam, the bracket is connected with the waist rail that sets up on a fender pile through oblique supporting beam, the utility model discloses simple structure not only has, practical reliable advantage, and design benefit moreover, the easy operation that should be under construction is convenient, and usable soleplate reduces the concrete as bracket, basis ground frame roof beam as the bracket grade beam, and it is low to reduce the cost, is under construction simultaneously when the construction bottom plate that this connects bracket system, avoids resetting support system, reduces the process, and the saving time limit for a project, advantages such as bottom plate water -proof effects can be improved to the while.