In order to study the influence of straight through pore diameterwater depth and horizontal runoff velocity on the anti-clogging performance of new self-compacting pervious concrete (NSPC)the permeability coefficient of NSPC after blockage and high-pressure water gun flushing was tested. Based on the probability that the blockage is captured by straight through porea NSPC clogging model was established. The results show that the permeability coefficient of NSPC increases with the increase of diameter of straight through pore. When the ratio of straight through pore diameter to blockage particle size is greater than 5the particle flow formed by blockage still causes NSPC blockage. The increase of water depth reduces the permeability coefficient of NSPC after blocking. The horizontal runoff velocity has little effect on permeability coefficient of NSPCbut it delays the time of permeability coefficient reduction. The highest recovery rate of permeability coefficient of NSPC after high pressure water gun flushing reaches 85%. The established NSPC clogging model can predict the variation of the mass of blockage and the attenuation rate of permeability coefficient in straight through pore channel.