One-key start switch

The invention provides a one-key start switch. The one-key start switch comprises a shell, a circuit board is arranged in the shell, and a decorative ring is arranged at one end of the shell; the one-key start switch further comprises a middle frame, conductive rubber and an indicator light are arranged on the circuit board, a driving shaft is arranged in the middle frame, a button is arranged atone end of the driving shaft, and the button is located at the center of the decorative ring; an IMMO coil electrically connected with the circuit board is arranged on the outer wall of the middle frame, a plug slot is arranged at one end, towards the shell, of the middle frame along the radial direction, a noise reduction block is inserted into the plug slot, and the noise reduction block protrudes from the inner wall of the middle frame, a blocking part is arranged at the outer wall of one end, relative to the button, of the driving shaft; the noise reduction block enables the blocking partto impact the noise reduct