Abstract:The 26 origins of Pinus armandi were used as the test materials. The inheritance and character variations of the 8 years old juvenile forest were analysed. Through the researches, we found out that there were significant differences among different provenances, and there was notable linear correlation between the majority of the characters and the latitudes in their original places. Pinus armandi shows a latitudinal decline. The provenance of Yunnan-Guizhou Plateau grows faster; its biomass yield is high and its needles are longer and are in small density. The provenance of Qinling-Dabashan Mountains is on the contrary. The leading factor of the variations is caused by the extreme temperatures of the original places of Pinus armandi.