CAN bus data transmission monitoring system

The invention relates to a CAN bus data transmission monitoring system and belongs to the technical field of CAN bus data monitoring. The CAN bus data transmission monitoring system aims to solve the problem that CAN bus data transmission interruption can be caused by faults in CAN buses. A CAN bus of the CAN bus data transmission monitoring system serves as a data transmission line and comprises two paths of CAN buses and a single-chip microcomputer driving minimum system. The data transmission end of the CAN bus is connected with a first data transmission end of a single-chip microcomputer, a second data transmission end of the single-chip microcomputer is connected with a data transmission end of an SD card, the single-chip microcomputer controls a TFT color screen through an FSMC bus, controls a voice chip through an SPI bus and controls a liquid crystal display screen through the SPI bus, a first output control end of a key module has a CAN bus Baud rate through the single-chip microcomputer, a second ou