The　large　anomalous　Hall　effect　(AHE)　has　recently　been　found　in　noncollinear　antiferromagnet　Mn3Sn.　However,　the　complex　magnetic　structure　and　its　correlation　with　the　AHE　remain　unclear.　Here　we　investigate　the　magnetic　structure　of　Mn3Sn　completely　by　means　of　both　the　temperature　and　magnetic　field　dependence　of　neutron　power　diffraction.　This　study　establishes　the　possible　incommensurate　magnetic　structure　models　and　extracts　the　temperature　evolution　of　the　magnetic　moment　of　the　Mn　atom　over　the　whole　temperature　range　for　Mn3Sn.　The　large　AHE　of　polycrystalline　bulk　Mn3Sn　is　measured　in　detail.　By　comparing　the　temperature　dependence　of　the　spontaneous　component　of　the　AHE　and　the　magnetic　moment,　direct　experimental　evidence　reveals　that　the　triangular　antiferromagnetic　ordered　moment　of　the　Mn　atom　controls　the　change　in　the　AHE　of　Mn3Sn.　This　study　provides　the　possibility　to　control　the　AHE　of　functional　materials　via　changing　the　magnetic　structure.