Hole wall defect detection method and reference test board

The invention belongs to the technical field of nondestructive testing, and discloses a hole wall defect detection method and a reference test board. According to the hole wall defect detection method, a square plate is manufactured, and a through hole is machined in the square plate; a standard gap is machined in the inner wall of the through hole; detecting the length, width and depth of the standard gap through ultrasonic equipment, and determining detection parameters for detecting the standard gap; detecting the hole wall of the to-be-detected hole of the to-be-detected piece through ultrasonic equipment; and analyzing the detection result of the hole wall of the to-be-detected hole. According to the hole wall defect detection method, the actual defect can be accurately simulated through the standard gap, and the shape of the actual defect can be furthest approached, so that the detection result is more accurate when the ultrasonic equipment is used for detecting the to-be-detected hole. According to the