Fuel cell stack and insulation structure thereof

The fuel cell stack insulation structure comprises a package and a first end plate, the package serves as a stack shell, a cell is arranged in the package, and the first end plate is arranged at the open end of the package and serves as a sealing end cover, and meanwhile insulation of the cell at the open end of the package is achieved. The fuel cell stack structure further comprises a spacing plate arranged between the package and the first end plate, and the spacing plate comprises a support body and an insulation sealing layer. Wherein the support body is of a ring-like structure, is used for being pressed between the package and the first end plate, and is connected with the package and the first end plate; the insulation sealing layer is arranged on the surface of the supporting body, an insulation part is arranged on the insulation sealing layer located on the surface of the inner ring of the supporting body, the insulation part is a structural protrusion, a structural pit or a combination of the struct