The invention discloses a pressurization alkali-boiling method for removing a ceramic layer in a thermal barrier coating. According to the pressurization alkali-boiling method for removing the ceramiclayer in the thermal barrier coating, alkali liquor is used for removing the ceramic layer in the thermal barrier coating; when the ceramic layer is removed, an alpha-Al2O3 layer on the interface ofthe ceramic layer and a metal layer chemically reacts with an alkali solution under a high temperature and a high pressure, so that the ceramic layer is tripped, damage to the metal bottom layer is avoided, and the metal bottom layer does not need to be repaired, so that the procedures are simple, and re-coating of the ceramic layer is facilitated. The pressurization alkali-boiling method can be implemented conveniently and rapidly, the equipment structure is simple, and operation is easy. Compared with a traditional mechanical sand blasting method, the process parameters can be accurately controlled, and the consistency of the product quality is high. It is found through practice that a ceramic layer of a part treated through the method is completely removed and effectively stripped without damaging a metal layer; and the thickness of the metal bottom layer is not changed before and after the ceramic layer is removed.