Packer setting energy storage device and using method thereof

The invention relates to a packer setting energy storage device and a using method thereof.The packer setting energy storage device comprises a piston sleeve, a first step hole, a second step hole, a first sealing ring and a second sealing ring, the front end of the sleeve is detachably and hermetically connected with the tail end of the piston sleeve, and an oil outlet path is formed by the piston sleeve and an inner cavity of the sleeve; a second step hole is formed in the sleeve; the piston assembly is arranged in the first step hole of the piston sleeve and reciprocates in the first step hole; the distance ring is sleeved with the piston sleeve, the front end of the distance ring abuts against the step face of the first step hole, and the outer wall of the distance ring makes contact with the inner wall face of the piston sleeve; the spacer ring is used for being matched with the piston assembly so as to achieve circulation or non-circulation of an oil way; and the front end of the compression assembly ab