Device for delaying rusting of steel reservoir and using method thereof

The invention discloses a device for delaying rusting of a steel reservoir and a using method of the device. The device comprises the steel reservoir. The device further comprises an embedded sleeve, an inner container, an electrochemical reaction bag, a top sleeve and a drill bit device. The pre-embedded sleeve is pre-embedded underground beside the steel reservoir; the inner container is detachably and movably sleeved with the embedded sleeve. The electrochemical reaction bag is arranged in the inner container; the top sleeve is detachably and movably connected with the inner container; a metal lead is connected between the electrochemical reaction bag and the shell of the steel reservoir; the inner container comprises a reaction grid and a material storage grid; the reaction grid is arranged on the storage grid; an easy-to-penetrate bottom plate I is arranged at the bottom of the reaction grid; an easy-to-penetrate bottom plate II is arranged at the bottom of the top sleeve; the electrochemical reaction ba