The invention discloses a container truck-mounted crane type angle adjusting device. The container truck-mounted crane type angle adjusting device comprises a self-locking control rack, a hoisting adjusting mechanism and a lifting hook mechanism. The lifting hook mechanism comprises a hook, a hook support, a hydraulic motor II, a fixing plate and a bevel gear. The hook is located in a hanging hole of the hoisting adjusting mechanism. The hoisting adjusting mechanism comprises a lifting rack, a rotary shaft and rope winders. A steel wire rope is arranged on the rope winders, one end of the steel wire rope is fixed to the rope winders, and the other end of the steel wire rope is fixed to a connecting hole in the self-locking control rack. The self-locking control rack comprises connecting rods II, lock hooks, connecting rods I, a movable rod and pull rods. Transfer and horizontal movement of a container can be achieved, the container can incline relative to the ground at a large angle, bulk or barreled goods in the container can be rapidly dumped, time and labor are saved, manual loading and unloading are avoided, the labor intensity of workers is relieved, and working efficiency is improved.