Abstract: CO abnormal emission phenomena occurs frequently for full-mechanized caving mining face in shallow buried coal seam, based on 6104 working face, the methods of theoretical analysis and field measurement were used, the source of CO was analyzed during the initial mining, the structure model of CO abnormal emission was established, and the mechanism of CO abnormal emission was revealed, collaborative control technology of the ground and underground of CO over-limit was proposed. The results show that: the CO sources include efflorescent oxygenized belts of 6^# coal seam and 4^# coal seam and 5^# coal seam, the air channel is provided by the overlying crack in the goaf to the ground, negative pressure ventilation was the force source for the gas flowed back to the working face. In this paper, the over-limit problem of CO was effectively controlled by the technology such as positive pressure ventilation, nitrogen injection of the goaf, improving recovery rate and ground filling, and the results of field monitoring proved the reliability of the technology.