This?paper?has?tried?to?figure?out?a?new?method?of?the?major?function?of?division of mountainous from the perspective of multiple planning integration. It takes Lishui city as an?example,?and?comes?up?with?a?technical?line?of?major?function?division?of?mountainous and?hilly?region?which?was?combined?with?the?land?use?planning,?urban?and?rural?planning, national?economy?and?social?development?planning,?ecological?function?planning,?picking up?the?important?ecological?area?first,?extracting?two?kinds?of?index?about?ecology?and?social economy,?and?then?calculating?these?factors’?weights?with?the?AHP-Entropy?model,?then combining?with?actual?situation?of?area?to?figure?out?the?major?function?division.?It?divided 175?towns?in?Lishui?city?into?four?major?functional?areas:?9?Optimized?Development?Zones which?represented?for?the?cores?of?population?and?economic?development,?39?Key?Development Zones which had higher environmental carrying capacity thus needing to adopt enforcement of environment?protection,?106?Restricted?Development?Zones?of?greater?ecological?significance and 21 Prohibited Development Zones. The results showed that it was more reasonable to do the division of major function zones in the perspective of multiple planning integration. What’s?more,?it?played?a?very?important?role?in?solving?the?problem?of?the?conflicts?between ‘development’?and?‘protection’.