BMS test circuit and BMS test box

The utility model provides a BMS test circuit and a BMS test box, the BMS test circuit comprises a load unit, a voltage conversion unit and a fault test unit, and the load unit is used for being electrically connected with a BMS and providing a load for the BMS; the voltage conversion unit is provided with a first end and a second end, the first end of the voltage conversion unit is electrically connected with the voltage source, the second end of the voltage conversion unit is used for being electrically connected with the BMS, the voltage conversion unit is used for converting voltage output by the voltage source into power supply voltage, and the power supply voltage is used for supplying power to the BMS; the fault test unit is electrically connected with the voltage source, is used for being electrically connected with the BMS, and is used for carrying out fault test on the BMS. The load unit, the voltage supply unit and the fault detection unit are integrated on the test circuit, so that the BMS detecti