The permeable concrete substrate is an important component of road pavement in the construction of "sponge city", but it is inevitable that there will be siltation in the process of use, resulting in the failure of permeable function, partial or total loss of its use function. In order to understand the change of the use performance of permeable concrete after blockage, based on the actual working condition, the mud is prepared to simulate the blocking medium of permeable concrete substrate, the attenuation of its permeability is tested by designing an anti-clogging performance test, and the change of its internal pores after blockage is observed by scanning electron microscope. The results show that the anti-clogging test of the designed permeable concrete substrate can effectively simulate the clogging of permeable concrete during use. The results can provide relevant reference for the further application of permeable concrete.