Abstract:On the basis of eighteen needle,cone and seed-trails,56 natural stands of Pinus tabulaeformis in different parts of the entire range are shown to illustrate the geographic variation.The differences of 18 traits among stands are all highly significant and the geographic variation of some traits has close relationship with climatic conditions.There was a trend to have shorter and wider needles,bigger cones and seeds in cold and dry climate,but some exceptions occur in west parts of the range.The geographic variation of studied stands exists in two directions,namely latitude variation under the same longitude and variation from south-western part to north-eastern part across the entire range.