Abstract: In order to research the influence of the shale content on road application properties of Xigeda Soil mixed filling, heavy tamping test, compression test without lateral confinement, CBR and compression strength resilience test are performed. The research result indicates the following. The optimum moisture content and maximum dry density of mixed filling are mainly determined by the content of argillaceous siltstone, in addition to the effects of the particle size of shale, the water content and the shale content. The compaction results of artificial Xigeda Soil mixed filling and actual natural random mixed filling have obvious difference. The optimum moisture content and maximum dry density of mixed filling should carry on the dynamic values, based on the content of shale, content of water, compaction degree and content of massive shale of mixed filling in the practical engineering. When shale content (mass fraction) is lower than 65%, the unconfined compressive strength of mixed filling increases with shale content linearly. The unconfined compressive strength of mixed filling decreases with shale content linearly when shale content is larger than 65%.Compression strength resilience value of mixed filling increases with shale content. Through polynomial regressive analysis between shale content and CBR value, the polynomial regressive function of CBR value of mixed filling and shale content is established with good relevance.