Nondestructive testing device for rail defects

The utility model discloses a nondestructive testing device for rail defects, and relates to the technical field of rail defect testing equipment, in particular to a nondestructive testing device for rail defects, which comprises a bottom plate, and the top of the bottom plate is fixedly connected with a first support plate, a second support plate, a storage battery, a constant-current magnetizer and a push handle respectively. The bottom of the first supporting plate is fixedly connected with a discharging barrel, and the inner surface of the discharging barrel is fixedly connected with a cross-shaped rod. According to the nondestructive testing device for the rail defects, through the arrangement of a cross rod, a first servo motor, a positioning cylinder, a supporting rod, an extending cylinder and a sliding block, the nondestructive testing device for the rail defects has the effect of preventing a discharging pipe from being blocked when magnetic powder is thrown, and in the using process, the extending