CoMn2O4　microflower　and　microsphere　structures　have　been　facilely　and　solvothermally　realized　by　adjusting　the　urea　concentration.　The　morphologies　of　as-prepared　CoMn2O4　samples　were　investigated　using　field　emission　scanning　electron　microscope　(FESEM).　The　chemical　compositional　and　crystalline　structural　changes　of　as-prepared　samples　were　characterized　using　X-ray　diffraction　(XRD)　and　thermogravimetric　analysis　(TGA).　The　present　work　has　demonstrated　that　the　urea　concentration　has　played　an　important　role　in　formation　of　CoMn2O4　microflower　and　microsphere.　The　mechanism　of　the　morphology-controlled　synthesis　of　CoMn2O4　is　also　discussed.　(C)　2016　Elsevier　B.V.　All　rights　reserved.