Reinforcing steel bar bending device used for building construction and provided with protection mechanism

The utility model relates to the technical field of building construction, in particular to a steel bar bending device with a protection mechanism for building construction, which comprises a base, a limit frame I, a limit frame II and a rotating rod, the limit frame I is fixedly connected to the left side of the top end of the base, and the limit frame II is fixedly connected to the top end of the base and located on the right side of the limit frame I. According to the reinforcing steel bar bending device with the protection mechanism for building construction, a fixing column is in an I shape, the upper end and the lower end of the inner side face of the fixing column and the upper end and the lower end of the inner side face of a second limiting frame are located on the same horizontal plane, and the back face of the inner side face of the fixing column and the front face of the inner side face of the second limiting frame are located on the same straight line; when the reinforcing steel bars are located