The invention discloses a permanent-magnetism frequency-conversion air compressor. The permanent-magnetism frequency-conversion air compressor includes a device body, wherein the device body includesa table; the top of the table is fixedly arranged with a box body; a partition plate is arranged at the middle portion of one side of the box body; a display screen is arranged at the top end of of one side of the partition plate; a console is arranged at the bottom of the display screen; the other side of the partition plate is provided with a movable cabinet door; a handle is arranged on one side of the movable cabinet door; a trapezoidal frame is arranged on one side of the inner bottom end of the box body; and a motor box is arranged at the top of the trapezoidal frame. The permanent-magnetism frequency-conversion air compressor has the beneficial effects that the device is provided with a fixing rod, an armrest, a splint, a spiral handle, a screw rod, a connecting block, supporting legs, a buffer block, a bracket and a pulley; the device moves through the armrest and the pulley, so that the carrying and movement of the device are convenient; the device is fixed through the splint,the spiral handle, the screw rod and the connecting block, so that the stability and applicability of the device are improved.