The invention provides a movable type pile foundation drilling mud treatment device and belongs to the technical field of mud treatment. The movable type pile foundation drilling mud treatment devicecomprises a mud collecting pipeline, a waste mud pond, a mud purifying device, a chemical dosing stirring tank, a reaction tank, a waste mud treatment device, a conveyor and an accessory. All components are modularized, so that dismantling and vehicle-mounted movement are facilitated, and the components are connected through a valve and a pipeline for site application. According to the movable type pile foundation drilling mud treatment device, modularization of the mud treatment device is realized, the onsite assembling is convenient, the foundation excavation volume is small, and construction is easy. Purification, supplementation and recycling of mud are realized during the pile foundation drilling process and waste mud is also treated to really realize environmentally-friendly construction, energy conservation and environmental protection and zero emission.