Microcapsules consisting of 58# paraffin wax used as the cores and melamineformaldehyde resin used as the shell were synthesized by the insitu polymerization, and the improvement of apparent morphology and core content of microcapsules was researched. The effects of pH adjustment method, the type of curing agent and stratified treatment on morphology and thermal storage property of microcapsule were studied by SEM, PSDA and DSC. It indicates that pH adjustment is an important factor to microcapsules' morphology and the overall property of microcapsules is greatly improved when NaCl is used as curing agent. After stratified processing, particle sizes of the microcapsules show unimodal distribution and core material content is up to 86.1%.