Irrigation uniformity is one of the most important indicators of drip irrigation system, and clogging is perhaps the most common factor which affects the uniformity. In order to evaluate the influence of clogged emitters on the irrigation uniformity and the growth of crops during the operational process of drip irrigation system, the concept and computational method of location distribution uniformity of clogged emitters were set up based on the Christiansen uniformity, and then a new computational method of drip irrigation uniformity was proposed by using the arithmetic mean of the location distribution uniformity of clogged emitters and the flux uniformity of emitters, finally a comparison between several types of computational method of uniformity in a lateral and a subunit was made. The results showed that both the drip irrigation uniformity which considered the location distribution of clogged emitters and the Christiansen uniformity can reflect the influence of the amount of clogged emitter and the level of clogging on irrigation uniformity. In the meanwhile, the proposed method can also reflect the influence of location distribution of clogged emitters on the irrigation uniformity and overcome the weakness of Christiansen uniformity which only considered the influence of flow deviation. ©, 2015, Chinese Society of Agricultural Machinery. All right reserved.