Abstract: For the problem that scientific early forecast indexes for coal spontaneous combustion are insufficiency seriously at 011805 mine face of Jinfeng Mine, large coal spontaneous combustion experiment platform is applied to make a similar simulation for coal samples from Jinfeng Mine, and CO concentration and generation laws can be obtained from the test. Considering the specific mining conditions of 011805 working face and distribution parameters of "three zones" in goaf, and applying the calculation model of CO concentration safety indicators at the upper corner, the early warning quantitative indicators of spontaneous combustion at 011805 working face is given. Combing with gas monitoring data at upper corner during the normal recovery, the results verify that the CO concentration safety indicators calculation model can meet the requirements of early prediction for coal spontaneous combustion of 011805 working face in Jinfeng Mine.