The pneumatic diaphragm control valve with double seat consists of pneumatic diaphragm multi-spring actuator and double seat valve. It has the advantages of low height, light weight, easy installation and maintenance, etc. The double seat valve has an upper spherical valve core and a lower spherical valve core, when fluid is acting on the two valve cores, the generated pushing forces have opposite directions, near same amplitude and little unbalanced force; the large pressure difference is allowed, the rated flow coefficient shall be larger than that of same caliber on single seat valve, but the leakage of this valve is more than that of the single seat valve. It is suitable for the workplace with clean media, in where the leakage is not strictly required and the pressure difference between front and back of the valve is comparatively larger.