The invention relates to a shutter comprises a blade group and an electromagnet arranged in opposite to the blade group, wherein the blade group comprises a fixed blade, and at least one connection blade and a driving blade sequentially stacked on the fixed blade and connected with the fixed blade in a manner capable of relatively sliding along the same direction. The connection blade is connected with the fixed blade and the driving blade; a magnet is arranged on one end of the driving blade; the electromagnet is arranged opposite to the magnet; and the electromagnet can attract or repel the magnet through the change of the magnetic poles of the electromagnet by changing the current direction of the electromagnet, so as to further control the expansion and the contraction of the connection blade and the driving blade of the blade group. The shutter has simple structure, and can control the expansion and the contraction of the blade group by enabling the electromagnet to attract or repel the magnet by changing the current direction of the electromagnet to change the magnetic poles of the electromagnet. The invention also provides a camera module using the shutter.