A position adjustment apparatus for adjusting a position of a detection device, the position adjustment apparatus comprising: two support assemblies , each of the support assemblies comprising at least one support rod; a lifting frame arranged between the two support assemblies , the lifting frame having two ends respectively slidably connected to the support rods of the two support assemblies and being configured to move in a height direction of the support rods , the lifting frame comprising a mounting portion for mounting the detection device; and at least one height adjustment assembly arranged on at least one side of the lifting frame where one of the two support assemblies is located and configured to adjust a lifting height of the lifting frame , each height adjustment assembly of the at least one height adjustment assembly comprising a first pulley and a second pulley arranged in a height direction of the at least one support rod , and rotating shafts of the first pulley and the second pulley being both fixedly mounted on a support assembly arranged on the corresponding side of the lifting frame ; and a drive belt wound around the first pulley and the second pulley , the lifting frame being fixedly connected to a predetermined position on the drive belt , the drive belt being configured to drive the lifting frame to move as the first pulley and the second pulley rotate. two support assemblies , each of the support assemblies comprising at least one support rod; a lifting frame arranged between the two support assemblies , the lifting frame having two ends respectively slidably connected to the support rods of the two support assemblies and being configured to move in a height direction of the support rods , the lifting frame comprising a mounting portion for mounting the detection device; and at least one height adjustment assembly arranged on at least one side of the lifting frame where one of the two support assemblies is located and configured to adjust a lifting height of the lifting frame , each height adjustment assembly of the at least one height adjustment assembly comprising a first pulley and a second pulley arranged in a height direction of the at least one support rod , and rotating shafts of the first pulley and the second pulley being both fixedly mounted on a support assembly arranged on the corresponding side of the lifting frame ; and a drive belt wound around the first pulley and the second pulley , the lifting frame being fixedly connected to a predetermined position on the drive belt , the drive belt being configured to drive the lifting frame to move as the first pulley and the second pulley rotate. a first pulley and a second pulley arranged in a height direction of the at least one support rod , and rotating shafts of the first pulley and the second pulley being both fixedly mounted on a support assembly arranged on the corresponding side of the lifting frame ; and a drive belt wound around the first pulley and the second pulley , the lifting frame being fixedly connected to a predetermined position on the drive belt , the drive belt being configured to drive the lifting frame to move as the first pulley and the second pulley rotate. <EOS>