用半固相反应合成了苯甲酸锰，通过元素分析，Ｘ－射线粉末衍射，红外光谱确定了它的组成和晶体结构，它属单斜晶系，为层状结构．用ＤＴＡ和ＴＧ研究了它在空气和氮气气氛中的热分解过程，并用红外光谱表征了热分解产物．苯甲酸锰在空气中一步分解生成氧化锰，在氮气中除分解生成氧化锰外，生成的气相凝聚物成分比较复杂，主要成分是二苯甲酮和三苯甲烷等． Manganese benzoate was synthesized by semi-solid reaction. Its composition and crystal structure were confirmed by elemental analysis, X-ray powder diffraction and infrared spectroscopy. It belongs to monoclinic system and has a layered structure. Its thermal decomposition in air and nitrogen was studied by DTA and TG, and the thermal decomposition products were characterized by infrared spectroscopy. Manganese benzoate decomposition in the air one step into manganese oxide, in addition to the decomposition of nitrogen to generate manganese oxide, the resulting gas phase condensate composition is more complicated, the main component is benzophenone and triphenylmethane.