The　self-healing　polymer　material　which　was　embedded　microcapsules　possesses　the　ability　to　heal　cracks　automatically.　The　microcapsules　were　synthesized　by　in-situ　polymerization　in　an　oil-in-water　emulsion　with　urea　and　formal　dehydeastheraw　shell　material,and　epoxyresin(E-51)/　xyleneasthecore　material.　The　impact　of　stirring　speed　on　the　morphology　and　particle　size　of　synthetic　microcapsules　were　discussed　by　optical　microscopy　(OM),　scanning　electron　microscopy　(SEM),　and　Fourier-transform　infrared　spectrometer(FTIR).Microcapsules　of　400~1500　um　in　diameter　were　produced　by　appropriate　selection　of　agitation　rate　in　the　range　of　300~600　r/min.　©　(2013)　Trans　Tech　Publications,　Switzerland.