As an important unconventional natural gas resource, the efficient development and utilization of coalbed methane is of great significance to the optimization of energy structure. Coal-bed methane and natural gas enter the long-distance natural gas pipeline for mixed transportation. Before entering the long-distance pipeline, coal-bed methane must be dehydrated. It is a key step to ensure gas quality and ensure transportation safety. At present, the process of coalbed methane dehydration widely used triethylene glycol dehydration and molecular sieve dehydration process. A coalbed methane station of Blue Flame Coalbed Methane Company adopts triethylene glycol dehydration process for dehydration. During the operation of the dehydration system, there are problems of poor dehydration effect and unstable operation of the equipment. At the same time, the degree of automation of the control system is insufficient, and it is difficult to accurately adapt to the dynamic changes of working conditions. In order to solve these problems, after analyzing the existing process and equipment, it is found that the reason is that the differential pressure pump does not match the existing working conditions, the flow rate of triethylene glycol cannot be accurately measured and adjusted, the cooling effect of triethylene glycol lean liquid is poor, and the inlet pump temperature is high. By replacing the variable frequency electric drive high pressure reciprocating pump, adding the triethylene glycol lean liquid air cooler, reforming the gear flowmeter and upgrading and optimizing the control system, the failure rate of the equipment operation is reduced, the dehydration effect is improved, and the dew point of the exported coalbed methane is ensured to be qualified.