Deep scarification and soil preparation machine provided with tilling depth liquid level display device

A deep scarification and soil preparation machine provided with a tilling depth liquid level display device comprises a driving cab and an agricultural implement mounted at the rear of the driving cab, wherein the agricultural implement and a soil preparation machine are hooked through a rear-mounted three-link hitch; the rear-mounted three-link hitch comprises a fixed seat, a lifting arm, a lifting rod and a lower pull rod; and the deep scarification and soil preparation machine is provided with the tilling depth liquid level display device which comprises a hydraulic oil cylinder and a liquid level indicator, the liquid level indicator is mounted in the driving cab, the hydraulic oil cylinder is mounted between the lifting arm and the fixed seat at the rear of the deep scarification and soil preparation machine, and the hydraulic oil cylinder is connected with the liquid level indicator through a hydraulic oil pipe. The tilling depth liquid level display device of the deep scarification and soil preparation