Abstract: Abstract：The evaluation of the element mobility in the process of rock weathering should consider not only elements fixation and leaching status and their concentrations in the leachate (groundwater and laboratory soaking solutions, etc.), but also their relative content in the parent rocks. The ratios of atomic numbers of different elements in the groundwater in Emeishan basalt slope and laboratory soak solution are different from those in basalt parent rocks. The rock-forming mineral dissolution of Emeishan basalt is incongruent. According to the basalt composition change in the course of weathering and the chemical compositions of the groundwater in the basalt slope and the laboratory basalt soaking solutions，the element mobility sequence in Emeishan basalt weathering process of Ca> Na> Mg ≥ Si> K> Fe was determined. Mobile elements sensitive to the degree of weathering or immobile elements should be selected as indicative elements of the rock weathering degree, and Ca, Fe should be the preferred elements to evaluate the weathering intensity of the Emeishan basalt.