The invention discloses a building construction method based on a round steel bending gripper. The building construction method comprises the following steps: 1, digging a foundation pit; 2, constructing a raft foundation; 3, constructing a basement: 301, constructing a basement load-bearing structure; 302, constructing a basement roof: erecting a formwork, binding a reinforcement cage, arrangingassembled wire pipe junction boxes and wire threading pipes and pouring concrete; 4, constructing an aboveground floor. The building construction method is simple, reasonable in design, simple and convenient in construction and good in using effect; before construction of the basement roof, grounding jumpers are processed by the round steel bending gripper firstly and the assembled wire pipe junction boxes are assembled in advance, and on a construction site, the assembled wire pipe junction boxes assembled in advance and the wire threading pipes are arranged inside a moulding template of thebasement roof and each wire threading pipe is connected with a wire pipe connecting section connected therewith through a connecting connector, so that the construction efficiency can be greatly improved, the connecting quality of a dark pipe and a wire connecting dark box can be effectively guaranteed, the using effect is good, and thus the building construction efficiency is improved.