Site　Selection　and　Capacity　Determination　of　Multi-Types　of　Distributed　Generation　(DG)　have　a　significant　impact　on　the　distribution　network　planning.　Therefore,　it　is　necessary　to　scientifically　analyze　the　impact　of　the　distributed　generators　on　the　distribution　network,　Considering　the　minimum　sum　of　investment　cost,　network　loss　cost　and　power　outage　loss　cost,　the　grid　planning　model　is　established　by　considering　network　constraints　such　as　voltage　constraint,　line　capacity　constraint,　power　flow　constraint　and　reverse　power　flow　constraint..　The　genetic　algorithm　is　used　to　solve　the　optimal　grid　planning　scheme　for　the　distribution　network　with　microgrid.　Finally,　the　IEEE　14-bus　Distribution　Network　is　analyzed　for　the　DG　location　and　volume　planning　in　Distribution　Network　to　verify　the　validity　and　feasibility　of　the　planning　model.　©　Published　under　licence　by　IOP　Publishing　Ltd.