This paper proposes a dual redundant CAN data acquisition device based on the HWD32F429 chip for embedded software applications. The device utilizes the domestic HWD32F429 chip as the core processor, with key peripherals including the JM3062W CAN bus interface chip, SM25QH256M SPI FLASH memory chip, NST175 temperature sensor, and GLb2582C serial transceiver. It also employs the FreeRTOS real-time operating system as the software platform for data acquisition. This design enables efficient reception and processing of CAN bus data, provides error indication through indicator lights to prompt and warn about operating system errors, and reduces node failure rate and data loss caused by increased data nodes through well-designed software. The proposed design has wide applicability in industrial manufacturing and automation.