The invention provides a presser foot for a sewing machine to sew thin cloths. The presser foot comprises a pressure bar, a connecting base and a presser foot, wherein the pressure bar is installed on the connecting base by a fixing part; a workpiece to be processed is pressed at the bottom of the presser foot; the presser foot also comprises springs, guide bars and two electromagnets; the guide bars are divided into upper guide bars and lower guide bars; the upper guide bars are installed on the two sides of the connecting base by connecting nuts; the lower guide bars correspond to the upper guide bars; the lower guide bars are installed on the presser foot; slide bars are arranged at the ends of the lower guide bars; the upper guide bars are provided with sliding holes corresponding to the sizes of the slide bars on the lower guide bars; the slide bars on the lower guide bars are inserted into the sliding holes on the upper guide bars; and the two electromagnets are respectively installed at the bottom of the connecting base and at the top of the presser foot. The presser foot has the following beneficial effects that as the electromagnets are arranged in the presser foot, the presser foot can carry out pressure microcontrol according to the elasticity of the thin cloths and is especially suitable for the sewing machines with high degrees of mechanization to sew thin cloths.