On　the　issues　concerning　about　dynamic　evolution　of　internal　relationship　in　organitational　network　and　chcnges　of　organizational　scale,　the　symbiosis　evolution　stability　of　independence　organization　populations　of　coadjutant　was　studied　by　Logistic　model.　The　symbiosis　stability　between　independence　populations　was　affected　by　the　strength　but　not　by　the　relationship　between　them.　As　long　as　there　is　no　undue　influence　on　the　two　populations,　the　symbiosis　stability　exists.　©　2016,　Beijing　University　of　Technology.　All　right　reserved.