Abstract: This paper analyzed the growth of Pinus caribaea plantations of 5-year-old at two sites in the east and northwest of Hainan Island. The experimental results showed that the growth of P. caribaea between two sites were different significantly. P. caribaea in the northwest performed better than that in the east. The growth among the three varieties of P. caribaea in two sites also performed differently. On the rich soil with thick soil layer in the northwest of Hainan Island where P. caribaea var. caribaea and P.caribaea var. bahamensis had best performance, their increments in diameter, tree height and volume were superior to P. caribaea var. hondurensis. While on relatively meager soil in the east, P. caribaea var. hondurensis grew better.