The invention discloses a forward-gap hot-gas anti-icing structure with a supporting plate for an engine, is suitable for the anti-icing structural design of aero-engine front-edge parts, and belong to the field of icing prevention for aero-engines. The forward-gap hot-air anti-icing structure comprises a composite material blade base body and a flute tube, and is characterized in that the blade base body is made from a composite material, air film gaps are inclined forwards, and the wall surfaces of the air film gaps are tangent with a hot-air impact wall surface. The forward-gap hot-air anti-icing structure makes the best of the advantage of jet impingement heat transfer, can improve the hot-air anti-icing effect of a guiding blade of the engine, and reduces the air entraining content and the induced air temperature of the engine, meanwhile, the weight of the engine can be reduced, and improvement of the performance, the security and the economy of the aero-engine are facilitated.