In order to study waterborne epoxy emulsified asphalt and epoxy mortar as surface strengthening materials for porous asphalt pavement surface strengthening technology, permeability coefficient test, Cantabro test, wet track abrasion test and friction coefficient test were used to study the effect of surface strengthening on the permeability, anti-ravelling and skid resistance performance of porous asphalt pavement. The application of surface strengthening of porous asphalt and the effect evaluation were relied on Xifu Expressway. The results show that after the surface strengthening, the permeability and skid resistance performance are reduced while the anti-ravelling performance is improved. 0.2 Kg/m²(0.02 g/cm²) of waterborne epoxy emulsified asphalt and 2 Kg/m²(0.2 g/cm²) of epoxy mortar are used in solid project to strengthen the surface of drainage asphalt pavement. The permeability has a loss after the surface strengthening. However, in the later process, the decrease rate of its permeability coefficient is obviously slower than that of ordinary porous asphalt pavement. It shows that the pore plugging of porous asphalt pavement can be reduced by surface strengthening. The friction coefficient has been reduced, but the performance still meets the standard. The ravelling loss of the core sample of porous asphalt pavement after surface strengthening is less than that of the ordinary porous asphalt pavement, indicating that it can improve the anti-ravelling performance of porous asphalt pavement.