Objective: This paper gives an overview of chemical and pharmacological reasearch in Arillus Longan. Method: The chemical constituents and pharmacological activites of Arillus Longan were summarized and analyzed based on the related references which were published in domestic and overseas in recent years. Result and Conclusion: The Arillus Longan contains many kinds of active chemical constituents and has various pharmacological activites. This article provies valuable references for the further reasearch and development of Arillus Longan.