The utility model belongs to the technical field of the pipe end welding seam nondestructive test of heat exchanger, evaporimeter and other similar structures, concretely relates to full -automatic heat exchanger pipe end angle welding checkout system. Including the control unit, the positioner that creeps, pneumatic quick locking device, X -ray detector, the control unit controls the positioner that creeps, X -ray detector and pneumatic quick locking device, the positioner that crawls is connected through pneumatic quick locking device with X -ray detector, the positioner that crawls is the cross intersecting structure who comprises base and movable block, base and movable block can rotate relatively with relative linear motion, pneumatic quick locking device comprises airlock male joint and airlock female joint, and the airlock male joint is installed on the positioner that creeps, and the airlock female joint is installed on X -ray detector. The utility model discloses can carry out ray inspection efficient, the high accuracy to heat exchanger pipe end angle welding.