Knuckle boom truck-mounted crane, the whole machine adopts finite element lightweight design, with light weight and small installation space; compact and beautiful structure; the new octagonal arm section has greater lifting capacity at the same amplitude and strong cross-section resistance to bending and torsion ; The high-position seat control of the turntable has a better working field of vision, and optional remote control operation; adopts regenerative control and a new sequential telescopic control system to reduce the pressure loss of the boom telescopic, improve the load telescopic capacity and the working efficiency of the whole machine; adopts a rotatable The double-stage double-cylinder outriggers not only improve the adaptability of the site, but also have a larger span and improve the working stability of the whole machine; using double reducers to drive the rotation, the rotation movement is smoother and more powerful, and the braking effect is better; get on the vehicle Hydraulic proportional valve has good micro-movement performance and can perform compound movements, with high operating comfort; the standard high-power radiator ensures that the oil temperature of the crane is not too high during long-term heavy-load operation; the standard hydraulic control torque limiting valve ensures that customers can use The crane is more secure; it comes standard with L-HM (CY) XCMG special wide-temperature hydraulic oil, which can be used in winter and summer.