we performed a comprehensive, quantitative phosphoproteomic profile analysis of six stages of the E. tenella life cycle: unsporulated oocysts (USO), partial sporulated 7 h oocysts (SO7h), sporulated oocysts (SO), sporozoites (S), second generation merozoite (M2) and gametocyte (G). The results revealed significant changes in the abundance of phosphoproteins during E. tenella development. The findings shed light on the key roles of protein phosphorylation and dephosphorylation in the E. tenella life cycle.