Thermal resistance and power cycle testing device for power module of automobile inverter

The invention relates to a thermal resistance and power cycle testing device for a power module of an automobile inverter. The thermal resistance and power cycle testing device comprises a device base, a cooling liquid cavity, a fixed seat and a quick clamp, the cooling liquid cavity and the fixing seat are both fixed on the device base, the quick clamp is fixed on the cooling liquid cavity, and the quick clamp is used for fixing the power module between the quick clamp and the cooling liquid cavity; a signal terminal side pressing plate, a signal terminal upper pressing plate, a high-voltage terminal mounting block and a high-voltage terminal pressing plate are arranged on the fixed seat; the signal terminal upper pressing plate is used for fixing pins of a power module, the high-voltage terminal mounting block is provided with a high-voltage wire harness, the high-voltage terminal pressing plate is used for fixing the high-voltage terminal mounting block and the high-voltage wire harness, and the signal ter