CuFeMnO4 spinel compound oxide was prepared by ethylene diamine tetra-acetic acid(EDTA)sol-gel method.By XRD, SEM and IR testing ,the effects of pH value of precursor sol on the phase structure ,surface morphologies ,spectral absorption proper-ties of synthetic powder were investigated.The results show that CuFeMnO 4 spinel compound oxide is formed from the dry gel cal-cined at 700℃after 4 h.The average crystallite size have reached a nano-scale,but the nano-crystallites reunited into relatively dense structure.The average grain size increases with the pH of the precursor sol , the integral average absorption rate is also in-creased further.When PH value is 6.5 ,the absorbance in 200-2500 nm wave length range from the obtained CuFeMnO 4 spinel com-pound oxide powders was about 88.339%.% 采用乙二胺四乙酸（EDTA）络合溶胶-凝胶法制备CuFeMnO4石复合金属氧化物，通过XRD、SEM、IR研究不同溶胶PH值对合成粉体物相结构、微观形貌和光谱吸收性能的影响。结果表明：制备的干凝胶在700℃煅烧4 h后形成CuFeMnO4尖晶石复合金属氧化物，平均晶粒尺寸都达到了纳米级，容易团聚成结构比较致密的颗粒状粉末。试样的平均晶粒尺寸随反应pH值的增大而增大，积分平均吸收率也随着提高。 PH＝6.5时，粉体对200～2500 nm波长范围的太阳光平均吸收率达88.339％。
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