This integrated portable air compressor is nearly noiseless, oil-free and environment-friendly. With the thickened pump head, the compressor now has stronger pressure bearing capacity. With the curved cylinder head strengthened, heat can now dissipate sooner through a larger surface area. The pure copper motor warms up fast, the temperature rise in the motor is low, and the output remains stable. The motor operates smoothly after the warm-up. The exhaust of high-end solenoid valve is discharged with a high flow rate.