Fixing device and battery monomer production system

The utility model provides a fixing device and a battery monomer production system.The fixing device is used for fixing a battery monomer prefabricated part and comprises a first supporting base, a bearing part, a clamping assembly and a driving assembly; the clamping assembly is arranged on the first supporting base; the clamping assembly comprises a first clamping piece, a second clamping piece, a third clamping piece and a fourth clamping piece, and the first clamping piece and the second clamping piece are arranged on the two opposite sides of the bearing piece in the first direction; the third clamping piece and the fourth clamping piece are arranged on the two opposite sides of the bearing piece in the second direction. The driving assembly is configured to be capable of driving the first clamping piece and the second clamping piece to be away from each other or close to each other in the first direction and driving the third clamping piece and the fourth clamping piece to be away from each other or close to each other in the second direction. In this way, the space for containing the battery monomer prefabricated part can be adaptively adjusted in the horizontal direction according to the shape and/or size of the battery monomer prefabricated part, and the application range of the fixing device is widened.