In order to explore the width of sandbag retaining wall is the key factor in the design of retaining wall and directly affects the overall stability of retaining wall. Based on the indoor model test method of sand bag retaining wall with wall width of 40 cm, 60 cm and 80 cm respectively, the law of settlement of backfill behind sand bag retaining wall, the distribution of horizontal displacement of wall surface and the distribution law of earth pressure behind and inside the wall are studied. The results show that the settlement of filled earth and widths of wall have a positive correlation. The horizontal displacement decreased with the increasing of the wall width,So increasing the width of retaining wall can improve its overall stability. With the the increasing of the height of the retaining wall, the earth decreased, becoming a drum type. The farther away from the wall back, the smaller the earth pressure, the more unconspicuous the change with wall height. It is concluded that the width of sand bag retaining wall had great influence on its bearing characteristics.