A test board for a charging device, comprising: a connecting circuit, configured to be connected to a charging device and a load module respectively to form a test loop between the charging device and the load module through the connecting circuit; a first communication module, configured to communicate with an upper computer; a second communication module, configured to communicate with the charging device; and a control module, connected to the first communication module and the second communication module respectively, and configured to receive command information sent by the upper computer through the first communication module, and generate a test command according to the command information, to cause the test board or the charging device to execute the test command; wherein the connecting circuit comprises a first power line, and a second power line, a first end of the first power line is connected to a positive electrode of the load module, and a second end of the first power line is connected to a positive power supply line of the charging device; a first end of the second power line is connected to a negative electrode of the load module, and a second end of the second power line is connected to a negative power supply line of the charging device; characterised in that the connecting circuit further comprises a switch transistor, and a sampling resistor, the switch transistor is connected in series on the first power line or the second power line, a control electrode of the switch transistor is connected to the control module, and the control module is configured to control the test loop between the charging device and the load module to turn on or off by controlling the switch transistor to be turned on or off; and the sampling resistor is connected in series on the first power line or the second power line, and both ends of the sampling resistor are connected to the control module, wherein the control module is configured to sample a current on the first power line or the second power line through the sampling resistor, use the current as a current of the test loop, and control the switch transistor when the current is greater than a preset current. a connecting circuit, configured to be connected to a charging device and a load module respectively to form a test loop between the charging device and the load module through the connecting circuit; a first communication module, configured to communicate with an upper computer; a second communication module, configured to communicate with the charging device; and a control module, connected to the first communication module and the second communication module respectively, and configured to receive command information sent by the upper computer through the first communication module, and generate a test command according to the command information, to cause the test board or the charging device to execute the test command; wherein the connecting circuit comprises a first power line, and a second power line, a first end of the first power line is connected to a positive electrode of the load module, and a second end of the first power line is connected to a positive power supply line of the charging device; a first end of the second power line is connected to a negative electrode of the load module, and a second end of the second power line is connected to a negative power supply line of the charging device; characterised in that the connecting circuit further comprises a switch transistor, and a sampling resistor, the switch transistor is connected in series on the first power line or the second power line, a control electrode of the switch transistor is connected to the control module, and the control module is configured to control the test loop between the charging device and the load module to turn on or off by controlling the switch transistor to be turned on or off; and the sampling resistor is connected in series on the first power line or the second power line, and both ends of the sampling resistor are connected to the control module, wherein the control module is configured to sample a current on the first power line or the second power line through the sampling resistor, use the current as a current of the test loop, and control the switch transistor when the current is greater than a preset current.