Angle measuring method, angle measuring device and X-ray industrial nondestructive testing equipment

The invention relates to the technical field of X-ray industrial nondestructive testing equipment, and provides an angle measuring method, an angle measuring device and X-ray industrial nondestructive testing equipment. The angle measuring method is used for measuring a first angle between the central axis of a detection plane of an area array detector and the vertical direction; the area array detector is used for the X-ray industrial nondestructive testing equipment, the X-ray industrial nondestructive testing equipment further comprises a ray source and a placement table, the ray source is used for emitting X-rays to a detection plane, and the measurement method comprises the following steps: acquiring a plurality of first images of a preset object through the X-ray industrial nondestructive testing equipment; wherein the preset object comprises a metal rod, the extension direction of the metal rod is perpendicular to the surface of the placement table, the rotation angles, corresponding to the multiple fi