The invention discloses a method and a device for repairing handwritings of digital painting and calligraphy. The method comprises the following steps of (S1) carrying out descending-order arrangement on a current handwriting point set and an original handwriting point set respectively according to respective y elements, and calculating a current handwriting gravity center and an original handwriting gravity center; (S2) according to the current handwriting gravity center and the original handwriting gravity center, obtaining inclination rate of handwriting operation; (S3) combining the original handwriting point set and the current handwriting point set into a corresponding pixel point pair according to the arrangement sequence, and obtaining the optimal inclination rate by iteration; (S4) calculating the number (num) of the handwritings needing to be constructed according to the inclination rate and the gravity-center distance; (S5) calculating the offset of the handwritings in each copying according to the value of the number; and (S6) copying the corresponding offset of the current handwriting for num times and establishing a constraint window. The method and the device disclosed by the invention have the beneficial effects that in the process of utilizing the digital painting and calligraphy device for creating, discontinuous-handwriting data among the handwritings of painting and calligraphy can be automatically repaired in real time, so that integral continuity and natural ornamental value of the handwritings of painting and calligraphy are improved.