Abstract: The introduction of Japanese larch in Pingshun mountain ous region locatedin south Taihang mountains was investigated. The results indicate that the eco-logical conditions in Taihang mountains of introducing Japanese larch is simi-lar to that in orginal place, while the differences of ecological conditions in Pingshun mountain are that the Taihang mountain regionis situated at interiorconcinent of china, where has quite clear continental climate, the difference inmean temperature between summer and winter is larger, and the annual prec-ipitation is only 33.5-61.4% of that in original place, the relative humidityis 8-18% lower than that in original place. Precipitation and humidity arethe leading ecological factors for introducing Japanese larch in Taihang mo-untain region. Therefore it is suitable to select the sites located in shade orsemishade slopes at 1300-1600m above sealeveI for introducing Japanese larchwhere the soil layer is deep, the soil is moist, and the air humidity ishigh. Meanwhile, under the same site conditions, the Japanese larch growsquickly, the annual height increment is 2.13-3.87 times as much as that inChinese Pine (Pinus tabulaeformis Carr. ),which is the main cultivated spe-cies in local place; moreover, the annual height increment and DBH of thedominant trees are 1.09m, 1.18cm respectively. As a whose, it is successfulto develope Japanese larch in the south of che Taihang mountains and thetemperate zone of south till 39 degrees north latitude.

Key words: The Japanese larch, The Taihang mountains, Introduction, Proper range, The interaction of site and enviroment