The present invention relates to a safety device for a cultivator, and in particular, when cultivators such as a tractor plow, a plow plow, a mower plow, a plowing machine, and a subsoil crusher are cultivating arable land, the shock is alleviated when an overload occurs due to obstacles such as stones or rocks. It relates to a safety device for a tiller that can be manufactured with a very simple structure to prevent damage and improve work efficiency. To this end, the present invention provides a main frame having a tractor connection unit connected to a tractor and towed, a plurality of cultivation units installed rotatably in the vertical direction on the main frame to cultivate the land, and each cultivation unit and the main frame A safety device for a cultivator comprising a plurality of cylinders installed between and elastically supporting the rotation of the cultivating part, wherein each cylinder includes: a body into which a rod is inserted to one side; a pressure plate formed at the front end of the rod inserted into the body, the pressure plate being formed smaller than the inner diameter of the body to form a space between the inner diameter and the outer diameter of the body; a first hydraulic hole formed in the body to introduce or outflow hydraulic pressure; and a first hydraulic sharing line connected to the first hydraulic hole to share hydraulic pressure with neighboring cylinders.
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