The invention discloses a method for high branch grafting of cercis canadensis forest pansy, which comprises the steps of lopping biennial seedlings of the cercis canadensis 1.0-1.4 meters away from the ground to form rootstocks, cutting annual branches of the cercis canadensis forest pansy as grafting branches with 1-3 sprout sections, grafting the grafting branches on the rootstocks by using a cleft graft method, and tying and fixing cleft graft openings by using plastic ropes. The invention has simple method, easy production implementation, good effect for fixing the grafting branches and high survival rate, and is scientific and reasonable. As the technical operability is good, safe and reliable, the method is suitable for the colored-leaf tree seeds with difficult normal breeding and seedling culture and cuttage breeding and seedling culture. The high branch grafting breeding technique has quick planting stock formation, short seedling culture period and good landscape property modification effect and meets the requirements on landscape quality of afforestation engineering. The method is in favor of improving the productive value of breeding and culturing the seedlings of the cercis canadensis forest pansy, improving benefit, popularizing on a large scale and meeting the requirements of markets.