Auxiliary fixing device for radiating fin

The utility model relates to an auxiliary fixing device for radiating fins, particularly to a fixing device used for supporting radiating fins in an auxiliary mode and is fixed on a system board. The utility model comprises the first fixing plate, the second fixing plate and a pin. The utility model is characterized in that a positioning pole of the first fixing plate is a hollow cylindrical body; the internal diameters of the cylindrical body becomes shorter from the top to the bottom; moreover, the diameter of the cylinder of the pin is shorter than the inner diameter at the upper end of the positioning pole, and is longer than the inner diameter at the lower end of the positioning pole. Consequently, the pin can be inserted into an inner hole of the positioning pole. The barb body at the lower end of the pin can be butted with the tail end of the positioning pole. Moreover, the tail end of the positioning pole pushed off can be used for interfering with the system board. Therefore, radiating fin groups can be fixedly positioned on the system board.