Recent studies on the water content, mantle potential temperature and source composition of Archean komatiites and Phanerozoic picrites in large igneous provinces indicate that the intense largescale magmatism over a short period of time is related to hydrated mantle plumes. The Emeishan large igneous province (ELIP), locating in the western margin of the Yangtze plate, is recognized as one of the large igneous provinces in China. It was divided into western zone, middle zone and eastern zone based on the geochemical works. The high water contents of Lijiang, Yongsheng, Binchuan, Dali picrites in the western zone and Ertan basalts in the middle zone indicate the Emeishan mantle plume may have been extensively hydrated since the early stage and this feature lasted until the middle and late stage. However, previous studies mainly focused on picrites, while basalts, the main constituent of ELIP, were seldom studied. This study focuses on the high Ti/Y basalts in Shiman and Daju sections, locating in the western zone of ELIP, by measuring the water content of clinopyroxene phenocrysts, finding that the water contents of their primary magma are higher than 1. 15% and 0. 83% respectively, which are slightly lower than Lijiang picrites. The calculated minimum water contents of their sources are 1380×10 -6 and 1245×10 -6, similar to Ertan basalts. Combined with reported data, we prove that the Emeishan mantle plume was extensively and longterm hydrated, and its thermochemical composition is heterogeneous and variable. This work also suggests the water content in the Emeishan mantle plume may radially decrease from the southern end to the northern end of the axis, from the axis to the edge, providing implications for the formation of large igneous provinces.