The utility model relates to a high reliability electronic ignition device, which comprises a normally open switch, a motion mechanism, a shape memory alloy temperature sensing control unit, an electric detonator, a wire and a shell, wherein one end of the normally open switch is connected with the motion mechanism, the other end is fixed on the shell, the shape memory alloy temperature sensing control unit is connected with the motion mechanism and is collocated into actions which control the motion mechanism, which leads the two ends of the normally open switch to separate or close. The two ends of the normally open switch are connected with the electric detonator through the wire, when the two ends of the normally open switch are closed, electric current is transported to the electric detonator through the wire, thereby exciting the electric detonator to work. Because single electric excitation is changed into heat excitation, thereby greatly increasing the high reliability of the electronic ignition device, fundamentally avoiding a false jetting phenomenon, and having the stronger functions of preventing circumscribed power fluctuation and strong electromagnetic interference. The high reliability electronic ignition device has simple structure, can widely use various aerosol automatic sprinklers, is safe and reliable, and has long service life.