The utility model provides a high-rise fireproof energy-saving sill which comprises a sill body, a fireproof layer and an antifouling board. The sill body is fixed to a wall body below a window, the fireproof layer is arranged on the lower side of the sill body, and the surface of the sill body is provided with the antifouling board. The surface of the antifouling board is provided with a reflecting layer, and the sill body and the lower portion of the fireproof layer form a slope shape. The length of the sill body is 50 centimeter, the antifouling board is fixed to the sill body through a fixing bolt, the fireproof layer is a magnesium board which is resistant to heat and can be subjected to burning in fire for a long time, and the reflecting layer is made of polished marble materials. The high-rise fireproof energy-saving sill has the advantages that the sill body and an outer wall of a building are protected against dirty marks caused by rainwater, sunlight entering a room is reduced, energy consumption in the room is reduced, and the purposes of saving energy and reducing emission are achieved. Once fire outbreaks at a lower floor, the fire can be prevented from spreading along the window, and therefore losses brought by the fire are reduced.