There　are　many　micro-fabrication　technologies.　Some　micro-components　can　be　fabricated　by　selective　laser　sintering　(SLS).　When　selective　laser　sintering　metal　powders　is　used　to　produce　micro-components,　there　are　numbers　of　factors　which　will　influence　final　result,　such　as　laser　wavelength,　laser　power,　diameter　of　laser　beam,　scanning　speed,　particle　size　and　materials　etc.　These　factors　are　not　single　but　interfere　with　each　other.　The　change　of　one　factor　will　greatly　affect　the　character　of　final　micro-components　(such　as　width　of　scanning　track,　dimension　error,　component　hardness　etc).　In　selective　laser　sintering　metal　powders,　many　experiments　are　needed　in　order　to　get　the　optimum　process　parameters.　However,　this　will　cost　much　time　and　money.　Moreover　in　later　process,　new　experiments　will　be　needed　in　order　to　get　the　optimum　process　parameters　due　to　the　change　of　one　factor.　Many　models　about　selective　laser　sintering　metal　powders　have　been　investigated　in　the　past.　Nevertheless,　these　models　are　about　the　interaction　of　laser　and　metal　powders,　and　the　physical　and　thermal　response　to　the　initial　condition.　They　are　provided　for　the　macro-fabrication.　No　model　can　be　applied　in　the　micro-domain,　and　no　one　aims　at　the　influence　of　these　factors　on　the　character　of　the　final　micro-component.　In　this　paper　a　numerical　model　about　the　relation　of　these　factors　and　the　character　of　final　micro-components　is　provided　to　minimize　the　number　of　experiments.　This　model　will　include　the　major　factors　of　SLS;　in　micro-domain,　and　through　such　a　model　we　can　deduce　the　numerical　value　of　optimum　process　parameters　from　final　micro-component　character　instead　of　making　a　lot　of　process　experiments.　Therefore　the　cost　of　micro-fabrication　with　SLS　techniques　will　be　greatly　reduced.