Thermal barrier coating （TBC） technology has the advantage of extending hot end component life， increasing power and reducing fuel consumption in aerospace engines. However， before performing electro-discharge machining （EDM） on the thermal barrier coated metal member， it is necessary to remove the thermal barrier coating on the surface of the metal substrate. Abrasive water jet machining （AWJM） are performed on the thermal barrier coating prepared by APS. Blind hole processing test of APS coating is carried out at room temperature using a low pressure abrasive water jet having a diameter of 300 μm. The results show that the erosion pore size and pore depth increase with the increase of abrasive concentration， jet pressure， punching time and target distance， and the coating removal rate increases with the increase of abrasive grain hardness and particle size. The roundness of the erosion hole type has yet to be improved.