In　this　paper　we　present　a　novel　report　on　the　upconversion　luminescence　performance　of　NaY　0.92　Yb　0.05　Er　0.03　F　4　enhanced　by　Zr　4+　codoping.　The　luminescence　intensity　of　the　tridoped　hexagonal　NaYF4　synthesized　by　a　hydrothermal　method　increased　to　the　maximum,　about　seven　times　of　the　non-Zr　4+　sample　when　the　Zr　4+　codoping　concentration　rose　to　6mol%,　while　the　luminescence　lifetime　was　also　prolonged　by　Zr　4+　codoping.　To　explore　the　relationships　between　the　microstructure　and　upconversion　properties,　X-ray　powder　diffraction,　field　emission　scanning　electron　microscope,　electron　energy-dispersive　spectroscopy　and　upconversion　emission　spectroscopy　were　employed.　From　these　characterizations,　we　found　that　the　codoping　of　Zr　4+　could　modulate　the　crystal　microstructure　of　NaYF　4　for　higher　upconversion　luminescence　intensity　and　longer　lifetime.　This　study　may　be　helpful　for　the　design　and　synthesis　of　high-performance　upconversion　materials.