Symmetrically inclined double-pile is a main type of inclined piles in structure’s foundation. Model tests were carried out on symmetrically inclined double piles with the pile inclinations of 0°, 5°, 10°, 15° and 20° respectively to investigate the bearing capacity characteristics. The factor of proportionality was employed to analyze the proportional relation between the bearing capacity of inclined double  piles and that of vertical double piles. The study indicates that as the pile inclination increases, the horizontal bearing capacity of inclined double  piles increases, whereas  the increasing rate slowed down gradually. Under the test conditions, when the inclination angle of inclined pile was 0°,15°,10°,15° and 20, the  horizontal bearing capacity ratio of inclined pile to vertical pile was 1, 2.2, 2.3, 3.0, 3.5, respectively.  