A rotary work platform comprises a platform; the platform comprises horizontal supports and vertical support connected with the horizontal supports; the vertical supports are fixed on two sides of a steel mould trolley top mould support through lug plates and adjusting rods; one end of the lug plate is fixed outside the steel mould trolley top mould support, and the other end is hinged to the top in the vertical support; one end of the adjusting rod is hinged to the bottom in the vertical support, and the other side is fixedly connected with an oblique rod in the steel mould trolley top mould support through a bolt. The work platform is matched with the hinged lug plates and the adjusting rods in application, so the work platform can be rotated; the work platform can be adjusted to the horizontal state when the steel mould trolley works under different conditions like an oblique cave segment and a bending segment in construction, so construction people can work on the platform, thus ensuring construction safety.