The invention discloses a device and a method for continuous growth of a large-size perovskite monocrystal and belongs to the field of a manufacturing process of novel material apparatus, wherein the perovskite monocrystal with high crystallization quality continuously grows on the basis of circulation and temperature-inversion crystallization. According to the device, circulation of a perovskite solution in the device is realized by the aid of temperature difference between a perovskite crystal growing bottle and a raw material driving bottle, the oversaturated perovskite solution in the raw material driving bottle is continuously transported to the perovskite crystal growing bottle to participate in temperature-inversion crystallization; furthermore, the growing speed and the growing size of the perovskite monocrystal are controlled through control of respective temperatures T1 and T2 of the perovskite crystal growing bottle and the raw material driving bottle, the corresponding temperature difference T of the perovskite crystal growing bottle and the raw material driving bottle, the growing time t of the overall perovskite monocrystal as well as raw materials m added to the device through the raw material driving bottle. The device and the method can realize continuous and rapid growth of the perovskite monocrystal and facilitate large-scale production. With the adoption of the crystal preparation method, the perovskite monocrystal with diagonal length the same as the size of the perovskite crystal growing bottle can be obtained through growing, the maximum growing speed is 1 cm/day, and remarkable industrial popularization value is obtained.