The invention relates to the technical field of exterior wall insulation, in particular to rock wool composite boards for exterior wall insulation of buildings, including a wall, the outer wall of one side of the wall is provided with several equidistantly distributed installation components, and the exterior of the wall On the surface, a rock wool composite board covered on the wall is fixedly installed through an installation component. A long through hole is provided at the corresponding position of the rock wool composite board and the wall, and the wall is close to the outer wall of the rock wool composite board. There are mounting grooves corresponding to the long through holes on the top. The beneficial effects of the present invention facilitate the installation of the rock wool composite board on the surface of the wall, and at the same time ensure the stability of the rock wool composite board during installation, avoiding the situation that the rock wool composite board falls off during long-term use, and the anti-seismic pad can play a role Very good cushioning effect, avoiding the cracking of the rock wool composite board due to external impact, greatly improving the strength of the rock wool composite board, improving its bending resistance, high shear strength, and good heat preservation effect.