CAN signal analyzing method and device

The invention discloses a CAN signal analyzing method and device. The method comprises the steps that a CAN signal of a finished car is obtained; the CAN signal comprises addresses of all data frames; a display screen is controlled to display the addresses of all the data frames; the address of one data frame input by a user is obtained, and data corresponding to the address of the input data frame are extracted; the data are converted into the Boolean quantity, and the display screen is controlled to display the Boolean quantity in the form of an indicator lamp; continuous bits of data of the data frame input by the user are obtained, and the continuous bits of data are converted into decimalism physical quantity data; the physical quantity data are corrected through the factor value and the compensation value, and the corrected physical quantity data are displayed in a coordinate axis graph of the display screen in a curve form. By means of the technical scheme, the time for a CAN analysis engineer to analyze the CAN signal of the finished car can be shortened, and the analyzing efficiency is improved.