The pneumatic film double seat regulating valve adopts the dual-oriented structure, the valve body is compact, the fluid channel is S streamline, the pressure drop loss is large, the adjustable range is wide, the flow characteristic precision is high. Because the top and bottom of the valve core are guided, it has the characteristics of anti-abrasion resistance. Regulator with more spring loaded diaphragm actuator, has the structure of the small output power, more suitable for the requirements good stability, high reliability, and high pressure and high pressure, fluid medium containing slurry easy plugging process conditions under the condition of good control.