Abstract: Scientific analysis of the combustion boundary of coal outcrop fire area and accurate judgment of its influence range and harm degree are conducive to putting forward effective control measures. Panzhihua City used advanced technical means and equipment such as high-resolution remote sensing and UAV aerial survey to carry out detailed detection of large-area fire areas in Baoding Coalfield. The combustion conditions of 39 fire areas were detected，and 44.85 km² optical images，10.30 km² thermal infrared images and 250 km² remote sensing images were formed. The area of outcrop fire area was delineated to be 174，300 m²，and the area of influence area was delineated to be 12，851，900 m². According to the detection results，the characteristics，causes and hazards of the fire area were analyzed，and the principle of " graded prevention，gradual promotion and comprehensive control " was proposed. Comprehensive prevention and control measures such as fire monitoring，fire source detection，water injection cooling，grouting fire extinguishing，coal stripping in high temperature area and loess coverage are adopted to promote the progress of fire area control，which provides basic data and decision-making basis for large-area fire area control in outcrop of Baoding Coalfield.

Key words: coalfield outcrop fire area, fire area control, satellite remote sensing, UAV aerial survey