It is a type of crane developed in the 1970s. Its lifting function is similar to that of a tire crane. It can also be used for lifting and driving without outriggers. The difference is the structural form of the chassis and the improvement in driving performance brought about by the unique chassis structure. The engines of this kind of crane are installed on the chassis, which has two axles and four large-diameter off-road tires. The four wheels are all driving wheels and steering wheels. When transferring work stations on a muddy and uneven construction site, all four wheels transmit power, that is, four-wheel drive, to improve the ability to pass through muddy and uneven roads. When driving at a high speed on a flat road, only the two wheels of the front or rear axle are used to drive to reduce energy consumption. In the random documents of the crane, 4×4 is used to indicate four-wheel drive, and 4×2 indicates that two of the four axles are driving wheels. This model is suitable for operations in small spaces. It can realize continuous stepless transmission, and the engine will not stall even if the road resistance changes suddenly, which greatly facilitates the driver's operation. The off-road tire crane is a powerful and flexible tire crane with expanded performance.