Millimeter wave radar testing device

The invention relates to the technical field of radar testing, and provides a millimeter wave radar testing device which comprises a darkroom, and an opening is formed in the side wall of the darkroom. The mounting mechanism is arranged in the darkroom, the mounting mechanism comprises a carrier and a first adjusting mechanism which are connected, the carrier is used for placing a tested piece, the first adjusting mechanism is used for driving the carrier to rotate around an axis parallel to a first direction and/or rotate around a vertical direction, and the first direction is perpendicular to the vertical direction; the detection mechanism comprises a rack arranged outside the darkroom and a detection assembly arranged on the rack, the end, away from the rack, of the detection assembly extends into the darkroom through the opening, and the first direction is perpendicular to the arrangement direction of the carriers and the detection assembly. The millimeter wave radar testing device can automatically simul