The invention discloses a process for removing water content from coking coal and belongs to the technical field of humidifying charged coking coal in the coking industry. The process comprises a process of crushing the coking coal, a process of dewatering by taking thermal flue gas as a dehydration medium and the like, and is characterized in that: at least one part of the process of crushing the coking coal and one part of the dewatering process are combined to be carried out by a hammer type crushing dryer. The effects of vigorous impact and overturn of the coking coal in the crushing process can be fully mastered and utilized, the dewatering economy and effectiveness of the coking coal are improved, and the process is applied to a coke oven coal preparation system with requirement of humidifying function and is applied to capacity expansion improvement of a conventional coke oven coal preparation system which does not have the humidifying function.