Vehicle-mounted mobile steam injection boiler is a kind of special equipment used in the steam injection and oil production process of oilfield,which belongs to ultra-long and ultra-wide special equipment,which often encounters special road condition and cannot turn and correct the position.In this regard,the relief device for vehicle-mounted mobile steam injection boiler was developed.Through the design of double slide rail structure,single-piston two-way hydraulic lock structure,and ball joint rotation structure,it can realize the ability to get out of trouble under special road condition such as continuous cycle walking,360° all-direction steering,and independent lifting.The relief device for vehicle-mounted mobile steam injection boiler can also be installed and used on vehicle with similar needs,which has promotion value.