The invention relates to a circuit board testing cabinet. The circuit board testing cabinet comprises a lower cabinet body and an upper cover plate. The cover plate is hinged to the lower cabinet bodyand can be fastened to the lower cabinet body. A middle cover plate is arranged at the upper end of the lower cabinet body. A tablet computer, a power switch, a minimum system board and a testing interface are mounted on the middle cover plate. A testing circuit board is mounted below the minimum system board in a stacked mode. A power module for powering the tablet computer, the minimum system board and the testing circuit board is mounted in the lower cabinet body. The minimum system board and the testing circuit board are designed in a standardized mode to meet development needs of different platforms. The circuit board testing cabinet has the advantages that the circuit board testing cabinet is portable, circuit boards are developed and tested conveniently and rapidly through modularized and standardized design, and upper computer software is designed and debugged flexibly through the industrial tablet computer.