Abstract: Capparis masaikai Lévl. was a kind of peculiar wild plant in China, rich in sweet protein mabinin in seeds. In five homologs of the mabinlin family, mabinlinⅡ possesses many advanced properties, such as being around 400-fold sweeter than sucrose on weight basis, the most heat stable and acid resistant among seven types of plant sweet proteins. Thus it would be a novel natural sweetener in food industry and had broad market prospect. The research status of Capparis masaikai Lévl had been emphatically outlined in this article. The active structure of mabinlinⅡ had been analyzed and the research progress of mabinlinⅡ in the genetic engineering has been summarized. This article would provide valuable reference for further studies on the growth of Capparis masaikai Lévl and the external expression of mabinlinⅡ.