Objective To analyze the magnetic resonance imaging (MRI) features and clinical value of postpartum placenta implantation before and after interventional therapy. Methods The clinical data of 30 patients with interruption of pregnancy or delivery hospitalized in our hospital were analyzed retrospectively. All patients were given bilateral uterine artery chemoembolization interventional therapy. MRI was performed at 1 week before and after treatment, and MRI results were compared with the clinicopathological diagnosis results, and the MRI features postpartum placenta implantation before and after interventional therapy were analyzed. Results The correlation between MRI diagnosis of postpartum placenta implantation and clinical pathological diagnosis showed Kappa=0.721, P= 0.000, and the difference was statistically significant. The MRI findings before interventional therapy showed that there were increased uterine volume, uneven signal intensity of placenta and the thinned or disappeared lower muscle layer, dynamic enhanced scanning showed that the placenta implantation was partially enhanced with nodular appearance. MRI findings after interventional therapy showed that the increased uterus volume was recovered to normal, and the implanted placenta was fused with the uterine wall, and the anomalous signal of invasion could still be observed in the myometrium. Conclusion MRI examination has high clinical diagnostic value in postpartum placenta implantation. It can clearly show the location of placenta implantation and the invasion of uterine myometrium, and can be used to evaluate the effect of interventional therapy for placenta implantation.