Gas pressure automatic starter

The utility model relates to an improved gas pressure automatic starter. An air pressure operating mechanism comprises a lever (4), a spring (5), a lever (6) and a draw rod (7). A contact head current conducting system is a reaction spring (10) which is arranged between a contact head supporter (8) and a shell body (9). The air pressure operating mechanism of the starter adopts a four bar linkage mechanism and the reaction spring which is arranged in the contact head current conducting system, and the utility model has the advantages of reliable work and long life time. No matter whether the action of the air pressure operating mechanism is quick or slow, contact heads can all close and open instantly, can directly start the operation and the stop of a motor below 11KW, and can improve the mechanical life time and the electric appliance life time by scores of times.