The radiation budget of Qinghai spruce (Picea crassifolis) forest was studied. The ratio of the components of radiation budget to the global radiation in the spruce forest crown was given, that is 12. 07% for the reflection,29. 46% for the long wave net radiation,and 58.47% for net radiation. The relationship between the components and the global radiation is a linear correlation. The global radiation within the forest crown decreases by 71-02% than that out of the forest. Amplitude of net radiation in the forest is less than that within the plant crown.