Safety protection device for on-site construction of infrastructure project

The utility model discloses an infrastructure project site construction safety protection device which comprises a protective fence main body, a warning sign and a base, the middle of the protective fence main body is in butt joint with the warning sign, the bottom end of the protective fence main body is connected with the base, one side of the top end of the base is in butt joint with a fixing column, and an adjusting mechanism is arranged in the fixing column. When the safety protection device for on-site construction of the infrastructure project is used, the transverse interception area of the protective fence main body is increased through the adjusting mechanism, so that the transverse blocking area of the protective fence can be increased without splicing a plurality of protective fences together by a worker, the time is saved, and the effect of conveniently adjusting the transverse interception area is achieved; and the stability of the protective fence main body is improved through the supporting me