Abstract: The present invention relates to a packing material for firestop systems and a manufacturing method thereof, and more particularly to a packing material for firestop systems, which comprises a thermal insulation material layer and a fireproof coating film, and a packing material for firestop systems, which further comprises a heat-resistant core material in the thermal insulation material layer, as well as a manufacturing method thereof. According to the disclosed invention, the fireproof coating film formed on the surface of the thermal insulation material layer increases the flame retardancy, waterproof property, abrasion resistance, dust resistance and restoring force of the thermal insulation material layer.