A miniature fluid control device, comprising: a gas inlet plate; a resonance plate assembled and combined with the gas inlet plate; and a piezoelectric actuator assembled and combined with the resonance plate, comprising: a suspension plate having a first surface and a second surface; an outer frame arranged around the suspension plate and having an assembling surface and a lower surface; at least one bracket connected between the suspension plate and the outer frame for elastically supporting the suspension plate; and a piezoelectric plate attached on the second surface of the suspension plate, wherein when a voltage is applied to the piezoelectric plate, the suspension plate is driven to undergo a bending vibration; characterized in that the at least one bracket is formed between the suspension plate and the outer frame as making the first surface of the suspension plate non-coplanar with the assembling surface of the outer frame and making the distance between the resonance plate and the second surface of the suspension plate larger than the distance between the resonance plate and the lower surface of the outer frame, so that a specific chamber spacing (g) is maintained between the first surface of the suspension plate and the resonance plate. a gas inlet plate; a resonance plate assembled and combined with the gas inlet plate; and a piezoelectric actuator assembled and combined with the resonance plate, comprising: a suspension plate having a first surface and a second surface; an outer frame arranged around the suspension plate and having an assembling surface and a lower surface; at least one bracket connected between the suspension plate and the outer frame for elastically supporting the suspension plate; and a piezoelectric plate attached on the second surface of the suspension plate, wherein when a voltage is applied to the piezoelectric plate, the suspension plate is driven to undergo a bending vibration; characterized in that the at least one bracket is formed between the suspension plate and the outer frame as making the first surface of the suspension plate non-coplanar with the assembling surface of the outer frame and making the distance between the resonance plate and the second surface of the suspension plate larger than the distance between the resonance plate and the lower surface of the outer frame, so that a specific chamber spacing (g) is maintained between the first surface of the suspension plate and the resonance plate. a suspension plate having a first surface and a second surface; an outer frame arranged around the suspension plate and having an assembling surface and a lower surface; at least one bracket connected between the suspension plate and the outer frame for elastically supporting the suspension plate; and a piezoelectric plate attached on the second surface of the suspension plate, wherein when a voltage is applied to the piezoelectric plate, the suspension plate is driven to undergo a bending vibration; characterized in that the at least one bracket is formed between the suspension plate and the outer frame as making the first surface of the suspension plate non-coplanar with the assembling surface of the outer frame and making the distance between the resonance plate and the second surface of the suspension plate larger than the distance between the resonance plate and the lower surface of the outer frame, so that a specific chamber spacing (g) is maintained between the first surface of the suspension plate and the resonance plate.