Campus security is an important part of social security in China. As reported in exist literature, very limited efforts are made to study mixed traffic flow behavior on campus. Present study attempts to highlight studies of single traffic flow or pedestrian-vehicle traffic flow. This paper deals with the research into the analysis of the characteristics of mixed traffic flow on campus, including cars, motorbikes, bicycles, and pedestrians. Total 440 minutes video data on two different locations on campus are extracted by employing videographic technique. The research is designed determine factors for traffic flow variety. Fluctuations in traffic flow depends on the student schedules, particularly during the peak time as there are large pedestrian flow and bicycle flow in short interval time. At the same time, a spatial-temporal analysis for establishing the relationship about mixed traffic flows is discussed. Flow models of speed-flow, speed-occupancy, flow-occupancy about mixed traffic are developed to illustrate behavior characteristics of mixed traffic stream on campus of different dimensions. The results obtained are significant for evacuation simulation and planning under various conditions on campus.