Abstract: The root samples of the 6 years, 9 years, and 12 years M26 dwarfed self-rooted rootstock ‘Fuji’ apple trees were collected by drilling.The root samples were collected under the plants, between the plants, between rows, and at the midpoints between the plants and rows.The effects of tree age on the spatial distribution characteristics of fine roots of fruit trees were studied, in order to provide reference for management measures such as fertilization.The results showed that in the horizontal direction, the planting area was the main concentration area of roots of each age of trees, and as the tree age increased, the number and absorption capacity of roots gradually decreased.In the vertical direction, the main concentration area of the root system showed a downward trend with the increase of tree age.At the same soil layers, the root length density, root surface area density, root dry weight density and specific root length of the fine roots all decreased significantly with the increase of tree age（P＜0.05）,but the overall difference between elder trees（9 years, 12 years） was not significant.For the same age trees, each index had a decreasing trend with the increase of radial distance from the main stem.In the vertical direction, the characteristics of fine root length density and root surface area density indicated that the root system mainly concentrated in the 0-60 cm soil layer, and the ratio of root length density to total root length density in 0-60 cm soil layer was 6 years＞9 years＞12 years tree age.