The invention discloses a hydraulic type driving system for an engineering driller. A drilling hydraulic cylinder and a hydraulic motor driving drill component are adopted to achieve drilling, and moreover, the control for a drilling stroke is achieved by the drilling hydraulic cylinder through a pulley block; the layout of the drilling hydraulic cylinder is flexible, the equipment layout space is optimized, so that a drilling component has larger rising space and dropping space basically, the drilling stroke is increased, the drilling movement times are reduced, and accordingly, the drilling construction efficiency is improved; meanwhile, with the optimization provided by the invention, the equipment layout space can be used sufficiently, and then the driller is enabled to be compact in structure; a hydraulic pressure driving structure and electrohydraulic control are adopted to achieve stepless speed regulation, and the system can be suitable for drilling requirements of different strata; a power head drive adopts a hydraulic motor drive and can reduce the speed by combining machinery, so that the reliability of power transmission is further increased, and adjustable range of torque change is larger; and during a use process of the equipment, the labor intensity is reduced, and the use cost and the manual cost are saved, so that the system can be used for construction of engineering pile holes and can meet the processing requirement.