Abstract: The changes of soil fertilities on young and half-mature Masson pine (Pinus massoniana) plantations with different generations were studied through the pair method with different generations (1, 2) and ages (8, 15, 18, and 20 a). The results as follows: after successive rotation,regardless of being the young growth or the half-mature forest,the soil density decreased,soil total porosity and soil moisture were on the rise, the soil physical properties was got improvement. The differences of soil density and soil total porosity in 20-40 cm half-mature forest between first and second generation were significant level. After successive rotation, the total K, total Mg and pH were declining, while the organic matter, total N, total P, total Ca and alkaline hydrolysis N, available P, available K were on the rise, and the differences of available P in 0-20 cm young forest and pH, the differences of alkaline hydrolysis N in 0-20 cm half-mature forest and total N, available P, available K,total K between first and second generation were significant or most significant level. The soil total Fe, Al, Cu, Zn, and Mn contents in young and half-mature forest were declining, and the differences of total Mn contents in young and half-mature forest between first and second generation reached significant level.