The invention discloses a method for detecting density of passengers in a bus on the basis of image analysis. The method includes the steps that (1) a binocular camera is arranged at the front end of the inside of the bus, and video images are shoot; when no passengers are in the bus, the images of the binocular camera are processed, so that depth images of the background in the bus are obtained; (2) a foreground objective of the area where the passengers stand in the bus is obtained; (3) by means of the perspective effect of the binocular camera, perspective correction is carried out on the image of the foreground objective of the area, the density is primarily divided into a low level and a medium and high level according to the area of the foreground, and if the density is in the medium and high level, the fourth step is carried out; (4) the video image of one camera body of the binocular camera at the same moment is captured and grayed, and texture features of the image are extracted; (5) detected passenger density information and geographical position information are stored. The method effectively solves problems occurring in the prior art, and the density of the passengers in the bus is detected by analyzing the images shot by the binocular camera.