The invention discloses a support method for a tunnel passing through a goaf. The support method comprises the following steps that 1, the position and the form of the goaf are determined, and the closest distance S between the goaf and the tunnel is measured; 2, the minimum safe thickness of a surrounding bed between the goaf and the tunnel is determined; 3, the safety, influenced by the goaf, of the tunnel is judged; and 4, the support method is determined according to the safety of the tunnel. The support method for the tunnel passing through the goaf has the advantages that the cost is reduced, the construction efficiency is improved, and the tunnel support requirements under different conditions can be met.