Molar　concentration　ratios　of　citric　acid　to　Ca2+affect　properties　of　CaMnO3powders.　In　this　paper,　CaMnO3gel　was　prepared　through　the　sol-gel　method　with　deionized　water　and　ethylene　glycol　as　solvent,　different　ratios　of　citric　acid　as　chelate,　and　metal　nitrates　as　starting　materials.　Perovskite　polycrystalline　CaMnO3powders　were　prepared　via　calcining　the　dry　gel,　and　were　analyzed　with　XRD,　SEM　and　Marlvern　granularity　analyzer.　The　results　show　that　the　crystal　size　ranges　from　20　to　50　nm,　and　the　resulting　perovskite　CaMnO3powders　are　flat-shaped　granules　of　about　300-500　nm.　The　granularity　and　crystal　size　of　the　CaMnO3powders　increase　slightly　with　the　increase　of　the　molar　concentration　ratio.