Abstract: Owing to the consult value of anti-pulls out coefficient λ_i can be set in a large variety, and calculating of the pulling capacity according to the λ_i has the very strong experience. Comparisons of the result of experiments for vertical pull-out show that pile pulling test is the most direct and the most accurate method. Experiment results indicate, the influence factor of the pulling capacity is not only a side bearing capacity, but also can be controlled by properties of pile's material.