The invention provides an IGBT low-frequency noise detecting device, relates to the technical field of electronic measuring, and solves the problem of damage to a device in the reliability detection of the electronic device in the prior art. The overall system comprises a hardware testing system and a software analysis platform. The hardware system comprises a power system, a low noise bias circuit, a low noise preamplifier and a high speed data acquisition card; the software analysis platform is divided into a time domain analysis module, a frequency domain analysis module, a data storage module, a data reading module, a signal acquisition module and a report generation module. The hardware system mainly completes the measurement of IGBT drain voltage noise, and the software platform mainly completes the time series display of low-frequency noise data, and completes spectrum analysis of the noise data obtained by the high speed data acquisition card, thereby finally achieving the low-frequency noise detection of an IGBT device. The IGBT low-frequency noise detecting device can avoid the irreversible damage to the device noise in the reliability detection of a traditional electronic device, and achieve the non-destructive detection of the low-frequency noise of the IGBT.