In a channel widening project, a new type of prefabricated gantry revetment structure was adopted.Aiming at the working condition of the structure under the vertical load on the shore, a model loading test based on the transparent soil PIV （particle image velocimetry）analysis technology is carried out.Through the whole dynamic observation method, the working mechanism and soil response characteristics of the new structure are revealed, which provided a basis for engineering design, and computing to provide technical support.The test results show that the working mechanism of the prefabricated bank revetment structure under the action of vertical load is relatively complicated.First of all, due to the existence of the connecting beam, the sheet pile and the square pile form a relatively stable spatial structural system, which can deform together to produce a coordinated effect, effectively to limit the horizontal displacement of the structure.Secondly, in engineering design, in order to give full play to the performance of each component of the front sheet pile and the rear pile portal structure, the matching of the flexural section modulus of the sheet pile and the square pile is very important.The amount should be larger.Finally, the bending moment, displacement and deformation of the sheet pile and square pile in the test are basically consistent with the calculation results of the engineering design using the?m?method, which verifies that the?m?method is suitable for the design and calculation of the structure, but attention should be paid to the value of?m.Otherwise, the result will be greatly affected.