The utility model relates to a fluid regulator, pressure control assembly. The utility model provides a pressure control assembly, its coupling to fluid regulator, this fluid regulator has regulator main part, actuator and discharge port. The actuator includes the actuator shell, set up in the actuator shell unfamiliar, inject in the first chamber of the first side of neighbouring diaphragm and inject the second chamber in the second side of neighbouring diaphragm. The discharge port forms in the actuator shell with first chamber coupling to atmosphere. Pressure control assembly includes flexible member, and it places downthehole at the discharge port. Flexible member can be in response to the pressure in the second chamber changes in downthehole removal.