Objective: To evaluate the preliminary phytochemical analysis and in vitro- Antihelmenthic activity of leaf extract of Achyranthes aspera. Background: Achyranthes aspera is an annual, stiff-erect herb found commonly as a weed throughout India. The leaf ethyl acetate extract showed high larvicidal activity on the tick larvae of Rhipicephalus. It strengthen the liver and kidneys, strengthening muscles, tendons and bones, anti-inflammatory, anti-toxin, urine laxative, normalize menstruation, hemostatic, ease childbirth. Chemical Ingredients includes Akirantin, glokosa, galactose, reilosa, ramnosa, and alkaloids. Hentriakontan, sapogenin, Betaine, ecdysterone, triterpenoid saponins. Methods: Preliminary phytochemical analysis was done by adopting the method of Evans. Antihelmenthic assay is performed by standard protocol. Result: The present study reveals the presence of few secondary metabolites and the extract exhibitspotent Antihelmenthic activity. Conclusion: From the present study it can be concluded that Achyranthes aspera leaf extract possessed marked in vitro Anti helminthic effect.