The utility model relates to a rock wool metal wind-resistant composite plate which comprises an outer steel plate, an inner steel plate and a rock wool core material arranged between the outer steel plate and the inner steel plate. The two sides of the outer steel plate are provided with a male buckle edge and a female buckle edge respectively. The two sides of the inner steel plate are provided with a female buckle edge and a male buckle edge respectively, and the female buckle edge and the male buckle edge correspond to the two sides of the outer steel plate respectively. Two composite plates can be connected in a buckled mode through the female buckle edges and the male buckle edges matched with the female buckle edges on the two sides of each composite plate. Connecting gaskets are arranged at the joints between the male buckle edges and the female buckle edges. The connecting gaskets are of a bent structure and are connected to the male buckle edges in a sleeved mode. The upper surfaces of the connecting gaskets are provided with connecting holes. Self-tapping screws pass through the connecting holes and penetrate through the connecting gaskets, the outer steel plate, the rock wool core material and the inner steel plate, and then the composite plate is fixedly connected to an outer wall. Compared with the prior art, the rock wool metal wind-resistant composite plate has the advantages that the wind resistance is remarkably enhanced, installation is easy and convenient, and the application range is wide.