The present invention provides a method and device for implementing original handwriting trace, and an electronic device. The method comprises: continuously sampling handwriting trace in time order, and detecting location information and the actual stroke widths at the sampling points; for every two adjacent sampling points, determining the former point as the starting sampling point, determining the latter point as the ending sampling point, using a line connecting the two points as the center line of the stroke between the two sampling points, obtaining location information of and the corresponding longitudinal stroke width at each point on the center line, and determining, according to the location information of and the corresponding longitudinal stroke width at each point on the center line, the fill gray value of each pixel in the stroke; and filling, according to the fill gray values, the corresponding pixels, and displaying the pixels. In this manner, graphic processing of the system is avoided, thereby accelerating the stylized trace processing, and bringing smooth writing experience to users.