The mechanical characteristic of soil mass under triaxial compression is always the base of studying the mechanical characteristic of soil mass under other loads, while the discrepancy of the mechanical characteristic of soil mass under different loads is mainly determined by the internal structure of soil mass. In order to study better the dynamic alignment of cohesive soils’ internal structure, the alignment information of cohesive soils’ microstructure is gathered and analyzed quantitatively, by using the image processing system made by our own lab.The study indicates: the pore’s and particle conglomerate’s change are all linked together under load; with the load increasing, the arrangement of the particle conglomerate is developed to the immethodical state and the pore’s directionality is better than the particle conglomerate’s; through changing its own form and adjusting its arrangement under load soil mass transform piece by piece into the steadily load bearing form and its deformation develop towards the trend that the deformation reduces.
