Alcohol detector based on commercial vehicle unit and CAN bus device

The utility model relates to an alcohol detector based on a commercial vehicle unit and a CAN bus device, which comprises a vehicle unit host (1), an LCD display touch screen (2), an alcohol detector (3), a CAN bus control module (5) and an AWS pre-warming system (6), wherein the vehicle unit host (1) is connected with the LCD display touch screen (2) through a data port and a control port; the vehicle unit host (1) is connected with the CAN bus control module (5) through an SPI interface; the CAN bus control module (5) is connected with the alcohol detector (3) through an input port; and the CAN bus control module (5) is connected with an AWS pre-warning system (6) through a CAN bus. The utility model can realize LCD display, touch screen operation, alcohol monitoring in a driver cab and the work of the AWS pre-warning system, so as to remind a driver in an intelligent and humanized way before a car runs and suffers from accidents, and effectively prevent traffic accidents.