The invention provides an emergency prevention device for a rolling door. The emergency prevention device is arranged between a wall and the iron rolling door and connected with a clutch, and comprises a frame piece, a lock piece and an internal control piece, the lock piece is provided with a rope control piece, one end of the rope control piece is connected with the lock piece, the other end ofthe rope control piece is connected with the clutch, and the lock piece controls the clutch to operate manually or automatically; a pressing button of the internal control piece performs pivotal swinging and pressing towards the inner portion of a containing chamber to drive a main control piece to pivot, a brake control piece is pushed through a cushion block, pivoting of the brake control piecedrive pulling of a drive-by-wire to control the operation of the clutch, and the iron rolling door is opened through a manual mode to achieve the goals of escape and rescue.