This　paper　presents　two　pieces　of　method　about　how　to　improve　performance　of　surfaced　-inserted　permanent　magnet　synchronous　generator　(PMSG).　One　way　is　increasing　q-axle＇s　synchronous　inductance　appropriately,　this　way　can　reduce　voltage　regulation　rate　which　is　an　important　point　that　let　permanent　magnet　synchronous　generator　can　be　used　widely.　The　other　way　is　using　skewed　slot　to　reduce　cogging　torque,　this　can　reduce　axle＇s　mechanical　damage.　This　paper　uses　finite　element　method　to　build　permanent　magnet　synchronous　generator＇s　model　and　result　of　calculation　shows　that　the　method　above　can　improve　permanent　magnet　synchronous　generators＇　performance　exactly.