Hydraulic control system and crane therewith

The invention provides a hydraulic control system and a crane therewith, wherein the hydraulic control system includes an oil inlet pipe and an oil return pipe and also includes: a total control valve group, which includes a first reversing valve being connected between the oil inlet pipe and the oil return pipe, when the first reversing valve is in a first work position, the oil inlet pipe and the oil return pipe are communicated with each other; a weight balancing control valve group which is arranged between the oil return pipe and the first reversing valve, is disposed at the downstream of the first reversing valve, is connected to a weight balancing oil cylinder and drives the weight balancing oil cylinder to stretch out and draw back; an operation room control valve group which is arranged between the oil return pipe and the first reversing valve, is disposed at the downstream of the first reversing valve, is connected to an operation room oil cylinder, and controls the operation room oil cylinder to stretch out and draw back. When the first reversing valve is at a second work position, the oil inlet pipe is communicated with the weight balancing control valve group or the operation room control valve group through the first reversing valve, and when the weight balancing oil cylinder is not operated, the oil inlet pipe is communicated with the oil return pipe through the weight balancing control valve group, or when the operation room oil cylinder is not operated, the oil inlet pipe is communicated with the oil return pipe through the operation room control valve group. The system allows low-pressure unloading.