In this study, we investigated the intraspecific and interspecific competition of Pinus dabeshanesis (P. dabeshanesis) in Dabieshan Mountains, Yuexi county of Anhui province, using Hegyi individual competitive indices (CI) model. The competition intensity was analysed from the 53 target trees and 2079 competitive trees within the P. dabeshanesis community. The results showed that intraspecific and interspecific competition intensity of P. dabeshanesis accounted for 17.11% and 82.89% in the total competition intensity, respectively, indicating a remarkable effect of the interspecific competition. The value of the main competition intensity was laid out in numerical order, i.e., Quercus serrata > P. dabeshanesis > Pinus taiwanensis > Rhododendron mariesii > Castanea seguinii > Hamamelis mollis > Stewartia sinensis > Dendrobenthamia hupehensis > Bothrocaryum controversum > Carpinus turczaninowii. Notably, the competition intensity of P. dabeshanesis decreased inversely to diameter of the breast height (DBH), which showed a stronger competition at DBH of < 25 cm and appeared weaker at DBH over 25 cm. The relationship between the whole forest competition intensity and DBH of the target tree followed the power function (CI= AD^-B). In conclusion, this model could effectively predict the intraspecific and interspecific competition of P. dabeshanesis.