The invention belongs to the technical field of building materials, in particular relates to acrylic ester emulsion modified cement base rapid repair mortar. The mortar consists of sulphoaluminate cement, desulfurated gypsum, quartz sand, an acrylate emulsion, a water reducer, polypropylene fiber, calcium formate, a defoamer and water. The problems that the traditional inorganic repair mortar is low in adhesion strength, is large in shrinkage, is easy to fall out, and the like are solved through using the mortar provided in the invention, thereby overcoming the defects that the compatibility of organic repair material and cement base material is poor, cost is high, and the like. By using the mortar in the invention, the problems of slow setting time, low early strength and large shrinkage of polymer modified cement base repair mortar are solved. The mortar in the invention has the advantages of high early strength, especially high breaking strength, stable later strength development and good flexibility and crack resistance, and is suitable for rapid repair of various cement base materials.