The invention relates to a method for recovering a clearance of a porous asphalt pavement, which comprises the following steps of: carrying out dust-absorption treatment to pollutants in the asphalt pavement clearance, preparing a cleaning solution, flushing a porous asphalt pavement with high-pressure cleaning solution, and the like. A great deal of researches and experiments show that the method can effectively recover the clearance of the porous asphalt pavement, improve the water permeability and various pavement performances of the porous asphalt pavement and prolong the service time of the porous asphalt pavement. The invention can be used for cleaning clearance blockage of the porous asphalt pavement.