The invention relates to a disassembly-free detection device for an IGBT power unit. The disassembly-free detection device comprises a control mechanism and a test article control power supply unit; the control mechanism is in control connection with the test article control power supply unit; the control mechanism is provided with a communication interface which is in communication connection with a test article control loop; the test article control power supply unit is provided with a power supply interface used for being in power supply connection with a test article energy taking loop; the control mechanism is used for controlling the test article control power supply unit to supply power to the test article energy taking loop; and the control mechanism is used for communicating withthe test article control loop to judge whether the voltage/current output by the test article control power supply unit meets the test requirement and whether the test article energy taking loop is normal or not. According to the disassembly-free detection device for the IGBT power unit provided by the invention, by adjusting the output range of the voltage or current of the test article control power supply unit for supplying power to the test article energy taking loop, the control mechanism communicates with the test article control loop to judge whether the voltage or current of the test article control power supply unit meets the test article requirement, results of normal, under-voltage and overvoltage are obtained, and the test article energy taking loop test is realized without disassembly.