Abstract: In view of the hidden risks existing in JG series annular coil winding machine，and to reduce the accidents of fingers broken in enterprise，a protection system for the coil winding machine is developed.According to the position of operator's hand and the danger degree，the device intelligence for speed-down is produced to achieve the purpose of safe protection.The safety device of the winding machine has advantages of intelligence，low cost，small volume，precise control and has a high economic benefit and broad prospect.

Key words: Infrared digital sensors, Annular coil winding machine, Safety protection device