The invention discloses a safety construction assembly capping beam operation platform which comprises a construction platform and a safety protection net. The safety protection net is vertically erected on the periphery of the construction platform, the construction platform comprises n main platforms and four right-angle platforms, n>=4, the main platforms and the right-angle platforms are connected end to end to enclose a hollow rectangular plane, the right-angle platforms are placed at four right angles of the hollow rectangular plane, adjacent side edges of the main platforms and the right-angle platforms are fixedly connected into a whole through fixing devices, the periphery of the safety protection net along the hollow rectangular plane is fixedly connected with the main platformsand the right-angle platforms into a whole through detachable rapid connecting devices, the safety protection net comprises a planar net and a right-angle net, the width of the planar net is matched with the length of each main platform, and the cross section of the right-angle net is matched with the right-angle shape of each right-angle platform. The safety construction assembly capping beam operation platform is used for occasions such as high-pier tie beam and capping beam construction.