Aiming at the problem that the bearing capacity of open-ended steel pipe piles is needed to enhance effective on site.On the basis of the bearing capacity mechanism of steel pipe piles and the data of high strain dynamic testing,we systematically analyze the impact of various factors on the bearing capacity of open-ended steel pipe piles,such as soil parameters of the pile around and the pile tip,dimensions of the steel pipe pile,depth of penetration,and the reduction coefficient of pile end resistance.The results show that it is essential to control the penetration during the final blows for primarily end-bearing driven pile.A lower penetration leads to a more pronounced effect of plugging,which in turn significantly increases the pile's bearing capacity.Conversely,the soil parameters and the bearing capacity reduction coefficient of the pile side and pile end may become smaller under the influence of construction factors and time effect,there is a need to prevent in advance the impairment of bearing capacity due to individual factors.