Objective The effect of dialectical acupoint acupuncture on maternal breast filling and lactation was discussed. Methods 156 women treated in our hospital from January 1 2020 to August 1 2021, which were divided into massage group, acupuncture group and observation group according to random digital table, with 52 in each group. The massage group used ordinary massage techniques and traditional Chinese medicine; acupuncture group used acupoint acupuncture, and meridian acupuncture with syndrome differentiation to observe chest rib pain, look, diet, mood and lactation and formula usage before and after the three groups, and scored breast filling. Results Before the experiment, no maternal indicators between the three groups (P＜0.05), after treatment, the data in the massage group were not obvious, the acupuncture and observation groups increased significantly, and the rise level and overall efficiency were higher than the acupuncture group (P＜0.05). Conclusion Meridian flow injection needle combined with dialectical acupoint selection acupuncture can effectively improve maternal breast filling and increase milk yield.