A device for folding an emergency exit seat for a bus includes: a main frame for supporting a seat; a first folding frame and a second folding frame; a first seat leg and a second seat leg; a hinge body configured in a way that the first folding frame is hinged at the first seat leg and the second folding frame is hinged at the second seat leg; a first latch assembly arranged between a rear end portion of the first folding frame and a rear end portion of the first seat leg; a second latch assembly arranged between a rear end portion of the second folding frame and a rear end portion of the second seat leg; a wire connected to the first latch assembly and the second latch assembly; and a strap connected to the first latch assembly.