The utility model discloses a rough-terrain wheeled crane of which all actions are driven in a full-hydraulic manner, and the rough-terrain wheeled crane can realize stepless speed change and has stable speed according to different work conditions, has the advantages of small impact, simple chassis arrangement, light complete vehicle weight, and is portable, safe and reliable in operation. The rough-terrain wheeled crane is provided with an electrohydraulic control system, a driving device and a steering device which are used for realizing fast switch among a plurality of driving modes and steering modes, thereby achieving small turning radius, fully exerting the power performances of an engine, improving the fuel oil economy and saving energy resources. The rough-terrain wheeled crane has a special underframe of an integral box type closed structure and is separately and rigidly suspended, an arc-shaped crane arm and an X-shaped telescopic support leg ensure good cross-country performance, mechanical property and working condition adapting performance of the entire rough-terrain wheeled crane during running and operating. The rough-terrain wheeled crane is convenient to maintain, and especially suitable for small construction places such as airports, oil fields, ports, wharfs, storehouses and other building sites.