The utility model provides a fast construction operating platform used for section steel column interior pouring concrete. The platform comprises a platform support structure which is arranged on a steel beam in a supporting mode and at least two fixing suspension structures which enable the platform support structure and a section steel column to form a fixing structure and are fixedly connected onto the platform support structure, the platform support structure comprises a baseboard which is provided with an installing surface, a horizontal support unit and a fence protecting unit, the horizontal support unit is fixedly connected onto the installing surface and is used for supporting the baseboard, the fence protecting unit is vertically arranged along the periphery of the installing surface of the baseboard, the fence protecting unit comprises a platform protecting support and a safety net which is arranged on the platform protecting support in a hanging mode to form a protecting fence, and each fixing suspension structure comprises a suspension body, a connecting end which is connected with the baseboard and the fence protecting unit, and a suspension end which is opposite to the connecting end and is used for suspending on the section steel column. The fast construction operating platform has the beneficial effect of improving the safety, the stability and the convenience of the operating platform.