The utility model provides an ultrahigh frequency electromagnetic wave signal detection sensor box, which comprises an aluminium-made casing, a carrying handle, an upper cover, a large size sunk screw, a bottom cover, an epoxy resin board, an arc board spacer, an arc board and a medium size sunk screw. The aluminium-made casing is a main body piece, and is of a rectangle box shape as a whole. The upper end of the aluminium-made casing is provided with the upper cover. The carrying handle is arranged on the upper cover. One end of the carrying handle is connected with the upper cover through the large size sunk screw. The lower end of the aluminium-made casing is provided with the bottom cover. The epoxy resin board is fixed in the middle of the bottom cover by a small size sunk screw. The medium size sunk screw is arranged at the connecting position between the bottom cover and the aluminium-made casing. That is to say, the bottom cover is connected with the lower peripheral circle of the aluminium-made casing by using the medium size sunk screw. The arc board spacer is arranged in the middle of the lower surface of the bottom cover. The arc board is arranged under the arc board spacer in a connecting way. The utility model has a simple integral structure, is convenient to use, and has high working reliability.