The invention discloses a 900mm last stage moving blade for a combined cycle steam turbine, which relates to a 900mm last stage moving blade, in particular to the 900mm last stage moving blade for the combined cycle steam turbine. The 900mm last stage moving blade for the combined cycle steam turbine aims at solving the problem that a last stage moving blade of an existing combined cycle steam turbine is short, and the safety of a last stage moving blade of a conventional condensing steam turbine is poor. A shroud ring, a blade work part and a blade root are forged to be an integrated body from top to bottom, a convex brace is arranged in the middle of the blade work part, and is made into an integrated body with the blade work part, a Stellite alloy plate is pasted on an air inlet side of the upper portion of the blade work part, the height of the blade work part is 900mm, the axial width of the root is 186mm, the diameter of the root is 1375mm, the exhaust area of the blade work part is 6.43m2, and the axial width of the blade root is 205mm. The 900mm last stage moving blade for the combined cycle steam turbine is used for the combined cycle steam turbine.