The invention relates to a plastic-steel heat-insulation fireproof window. The plastic-steel heat-insulation fireproof window comprises a window frame, a window sash and window glass, wherein the window sash and the window glass are mounted in the window frame, wherein the window frame and the window sash are each formed by splicing profile bodies; the profile body in the window frame is a first profile, and the profile body in the window sash is a second profile; fireproof through grooves are formed in the end faces of the profile bodies correspondingly;
metal rod pieces are arranged in the fireproof through grooves in a penetrating mode; filling through grooves are formed in the end faces of the
metal rod pieces and filled with
thermal expansion materials; the
metal rod piece in the first profile is a first rod piece, and the metal rod piece in the second profile is a second rod piece; gaps are formed between the filling through grooves in the first rod piece and the side edges of the first rod piece in a spaced mode; and the side face of one side of the filling through groove in the second rod piece coincides with the side face of one side of the second rod piece, and the coinciding side face is the side face, close to the adjacent first rod piece, of the second rod piece. The plastic-steel heat-insulation fireproof window has the effects that the window glass mounted in thewindow sash is not prone to toppling, and the fireproof performance of the whole fireproof window is ensured.