The invention discloses a rechargeable micro shell lithium ion battery structure and a processing technology thereof. The battery comprises a sealing assembly and a winding body, wherein an electrolyte is arranged in the sealing assembly, and the winding body is soaked into the electrolyte; the sealing assembly consists of a shell, a cover cap and a seal ring, the shell and the cover cap are made of metal materials respectively, and the seal ring realizes insulation between the shell and the cover cap; the winding body is provided with a positive lug and a negative lug, the positive lug is electrically connected with the cover cap, and the negative lug is electrically connected with the shell. The disadvantage that disposable button cells in the current market cannot be recharged for utilization is abandoned, and a rechargeable micro shell lithium ion battery is creatively provided. The battery is simpler in structure, lower in cost and higher in space utilization rate.