A lithium film forming mechanism, wherein the lithium film forming mechanism comprising a first separator providing mechanism, a second separator providing mechanism, a lubricating substance applying mechanism, a lithium ribbon providing mechanism and two rollers, the first separator providing mechanism is located upstream from the two rollers, and the first separator providing mechanism is configured to provide a first separator between the two rollers; the second separator providing mechanism is located upstream from the two rollers, and the second separator providing mechanism is configured to provide a second separator between the two rollers; the lithium ribbon providing mechanism is located upstream from the two rollers, and the lithium ribbon providing mechanism can locate a lithium ribbon between the first separator and the second separator and is configured to provide the lithium ribbon between the two rollers; the lubricating substance applying mechanism is located upstream from the two rollers, and the lubricating substance applying mechanism is configured to apply lubricating substances/a lubricating substance to surfaces/a surface, facing the lithium ribbon, of the first separator and/or the second separator before entering the space between the two rollers; and the two rollers are configured to roll the first separator, the lithium ribbon and the second separator, so as to roll the lithium ribbon into lithium foil and make the lithium foil adhere to the second separator to form a lithium film; wherein the lithium film forming mechanism further comprises a first separator winding mechanism, the first separator winding mechanism being located downstream from the two rollers, and the first separator winding mechanism being configured to wind the first separator penetrating through the space between the two rollers; wherein the lithium film forming mechanism further comprises a first release agent providing mechanism, the first release agent providing mechanism being located between the two rollers and the first separator winding mechanism, and the first release agent providing mechanism being configured to provide a release agent for the surface, facing the lithium ribbon, of the first separator; wherein the first release agent providing mechanism is a coating mechanism. the lithium film forming mechanism comprising a first separator providing mechanism, a second separator providing mechanism, a lubricating substance applying mechanism, a lithium ribbon providing mechanism and two rollers, the first separator providing mechanism is located upstream from the two rollers, and the first separator providing mechanism is configured to provide a first separator between the two rollers; the second separator providing mechanism is located upstream from the two rollers, and the second separator providing mechanism is configured to provide a second separator between the two rollers; the lithium ribbon providing mechanism is located upstream from the two rollers, and the lithium ribbon providing mechanism can locate a lithium ribbon between the first separator and the second separator and is configured to provide the lithium ribbon between the two rollers; the lubricating substance applying mechanism is located upstream from the two rollers, and the lubricating substance applying mechanism is configured to apply lubricating substances/a lubricating substance to surfaces/a surface, facing the lithium ribbon, of the first separator and/or the second separator before entering the space between the two rollers; and the two rollers are configured to roll the first separator, the lithium ribbon and the second separator, so as to roll the lithium ribbon into lithium foil and make the lithium foil adhere to the second separator to form a lithium film; wherein the lithium film forming mechanism further comprises a first separator winding mechanism, the first separator winding mechanism being located downstream from the two rollers, and the first separator winding mechanism being configured to wind the first separator penetrating through the space between the two rollers; wherein the lithium film forming mechanism further comprises a first release agent providing mechanism, the first release agent providing mechanism being located between the two rollers and the first separator winding mechanism, and the first release agent providing mechanism being configured to provide a release agent for the surface, facing the lithium ribbon, of the first separator; wherein the first release agent providing mechanism is a coating mechanism.