The SA/CS-CaCl2/PMCG microcapsule is a novel system which is formed by a polyelectrolyte complexation of sodium alginate (SA) and cellulose sulfate (CS) with poly(methylene co-guanidine) (PMCG) in the presence of CaCl2. In this paper, the effects of important parameters in preparation, such as the substituting degree of CS . the concentrations and ratio of CS and SA concentration of PMCG the solution used in the whole preparation process and reaction tune, on the characteristics of the microca...