The utility model discloses a single board testing device. In the testing device, a movable board in an upper clamping board and a lower clamping board is driven by a driving mechanism and vertically moves on the frame, so that the upper clamping board and the lower clamping board are clamped relatively. Furthermore along relative clamping of the upper clamping board and the lower clamping board, conductive probes on the upper clamping board and/or the lower clamping board electrically contact with an electric connecting end on the single board to be tested, and simultaneously the movable board contacts with the contact of a limit switch, thereby applying electric power on the conductive probes on the upper clamping board and/or the lower clamping board through the limit switch, and realizing electric power application testing for the single board to be tested. Compared with a standard meter adjustment and calibration platform with a complicated structure in prior art, the single board testing device has advantages of simple structure and convenient operation.