The utility model belongs to the technical field of steel structures, and particularly relates to a net rack node locating adjusting device, which comprises a bottom plate provided with a center circular hole, wherein the bottom plate is fixedly provided with a supporting tube, an adjustable support tube is connected into the supporting tube through threads and can vertically displace relative to the supporting tube, a cross positioning plate is arranged on the upper end face of the adjustable support tube, the center of the cross positioning plate vertically downwards projects to coincide with the center circular hole of the bottom plate. When the device is used for ball node locating, a coordinate conversion method is adopted, and precise locating of ball nodes is realized through measuring the coordinates of a center point of the cross positioning plate. The utility model provides a simple and effective device for locating and mounting a net rack structure ball node.