The present disclosure provides an electrostatic protection circuit, an array substrate, and a display device. The electrostatic protection circuit includes: a first voltage line, to which a high level voltage is applied; a second voltage line, to which a low level voltage is applied; and a switch assembly, including a plurality of first switch units and a plurality of second switch units arranged along a straight line and sharing an active layer. The first switch units are respectively coupled between the signal lines and the first voltage line, and are turned on in response to negative static electricity on the signal lines. The second switch units are respectively coupled between the signal lines and the second voltage line, and are turned on in response to positive static electricity on the signal lines. The signal lines are arranged in a peripheral region of the array substrate.