Knuckle boom truck-mounted crane, the whole machine adopts lightweight design, with light weight and small installation space; compact and beautiful structure; the luffing mechanism adopts connecting rod design, compact appearance and improved lifting moment; double-cavity large-span outrigger structure , the operation stability is better; the slewing reducer drives the rotation, 360° continuous rotation, and has strong adaptability to the working environment; the loading and unloading control, the turntable high seat control, and various control forms meet the needs of different customers; the standard L-HM (CY) XCMG’s special wide-temperature hydraulic oil can be used in winter and summer.