The invention discloses a dust barrel for a sewing machine. The barrel comprises a sewing machine, a controller arranged on the sewing machine and a barrel body, and the upper end of the barrel body is provided with an opening; the opening of the barrel body is provided with a barrel cover, and a protective hood is fixedly mounted above the barrel cover; the protective hood is provided with a brushless motor therein; the brushless motor is connected to a control system; the control system is connected to a switch, and a speed-adjustment knob; the brushless motor is connected to a fan blade which is positioned inside the barrel body; the fan blade is covered with a filtering cartridge; the protective hood is provided with a lifting handle; the protective hood is provided with an air exhaust opening; the barrel cover is provided with a first air opening and a second air opening thereon; the first air opening and the second air opening are communicated with the inner space of the barrel body; the control system is connected to a plug. The dust barrel of the invention can collect dust without the cooperation with an external air source, thus preventing the problem of loud noise in dust collection. The dust barrel has a wide range of application and is not subject to any limitation.