The invention provides a method for growing ABX3 perovskite single crystals in a low-temperature solution. According to the invention, a continuous growing method is adopted, and the ABX3 perovskite single crystals are rapidly grown in the low-temperature solution continuously with multiple periods and different stages. The concentration of the solution is high, and the raw materials required by growing are uniformly dissolved. Growing periods are added, and growing conditions are finely controlled, such that ABX3 perovskite single crystals with large sizes, regular shapes and high quality can be easily obtained. The method has the advantages of simple process, high operability, mild growing conditions, low required temperature, low energy consumption, low equipment requirement, low cost, high success rate, fast single crystal growth speed, fewer defects, good stability, large single crystal size (>10mm)*(>10mm)*(>10mm), and the like. Therefore, basic mechanism theoretical researches on perovskite materials and related optoelectronic devices (including solar cell, photodetector, LED and laser) are promoted.