Abstract: Based on observation and analysis of tree height, diameter, age and frequency distribution of Pinus sylvestnis var. mongolica Litv. in Southeast Maowusu sandland area, conclusions can be drawn to show that: ⑴The growth conditions of 50% to 80% of trees are more or less the same, 10% to 15% of trees are in poor conditions, and the growth conditions of 10% to 15% are better than the average conditions; ⑵As the trees grow, the differentiation of tree height and diameter is increasing, and the differentiation of diameter is more obvious and different; ⑶The growth of tree height and diameter are not in the same pace, the height increases faster than diameter when trees are young, and tree height and diameter of Pinus Slyvestris Var. Momgolica Litv above 18 all enter in the comprehensive flourishing period; ⑷The growth of Pinus sylvestnisvar. mongolica Litv. Is closely related to geographical conditions, it can not be grown well when the soil is poor and dry; ⑸Neither tree height growth nor diameter growth are in normal distributions; (6)It is feasible that Pinus sylvestnis var. mongolica Litv.are rational close planted, but large density of be planted will lead to slow growing，especially for trees of thickness growth.