The invention discloses an auxiliary violin teaching method and system based on augmented reality. The method is applied to an augmented reality device. The method comprises the following steps of acquiring music score information selected by a user; identifying a violin in reality to obtain the spatial position of the violin, and displaying virtual music scores in real time at a position suitablefor viewing in a display interface of the augmented reality device; and displaying virtual dynamic marks in real time at the spatial position of the violin according to the music score information inthe display interface, so that auxiliary violin teaching is realized, wherein the dynamic marks are used for guiding string pressing and bow drawing. By utilizing the augmented reality (AR) technology, a learner can follow the dynamic marks to perform string pressing and bow drawing on the violin in reality, so that the interactivity and vividness of violin learning are improved, the teaching difficulty is reduced, a beginner can be assisted in mastering the hand type and the correct posture of bow drawing, and the learning interest is improved.