Abstract: In order to understand the Effect of Coal Gangue Weathering on Coal Gangue Road Performance, three Kinds of Coal Gangue originating from Wuhai , Xuejiawan and Dongsheng areas and a common road aggregate as a comparatipn were sampled to test their stabilities, Consistence, Free Expansibility and Unconfined Compressive Strength under the artificial physical weathering and chemical weathering conditions as a road construction material in lab respectively. The results showed that the stabilities of Wuhai coal gangue was higher than that in others after the physical weathering and chemical weathering. The road performance such as Consistence, Free Expansibility and Unconfined Compressive Strength of weathered Xuejiawan and Dongsheng coal gangue could not meet the road requirement, while the Wuhai coal gangue and road aggregate were meet the road requirement.