The work aims to form amphiphilic copolymer of laurinol and sodium alginate through graft copolymerization by chemical methods, embed clove oil and then form microcapsules of sustained release and stability in different environments. Amphiphilic copolymer was used to embed clove oil and then form microcapsules. The effect of amphiphilic copolymers graft ratio on encapsulation efficiency was evaluated by using single factor experiment method with the embedding rate as the index. Then its effect on release and stability of microcapsules under different conditions was also evaluated on this basis. Results showed, in a certain range, embedding rate rose with the increase of grafting increases; the volatilization rate of clove oil microcapsule was 14.11%, far below its evaporation rate 61.25%; in release assay, sustained release of clove oil microcapsule was significantly better than unmodified sodium alginate. Clove oil microcapsule could release antibiotic constituents stably and slowly and could control the growth of escherichia coli. In conclusion, clove oil microcapsule that is formed by embedding of modified laurinol and sodium alginate has certain sustained release and mold resistance properties, and expands the scope of application of clove oil.