Coarse woody debris(CWD)in forest is the mediator and the link of nutrient distribution between pedosphere and biosphere in forest, whose storage affects the cycling of elements in forest ecosystems. This paper summarized the climatic factors that lead to the variation in CWD storage in forests by comparing the CWD storage in forest ecosystems located in several climatic zones. The temperature, precipitation and their temporal collocation are the causes to the varied CWD storage in forests through affecting the timber productivity, the survival rate of living trees and the decomposition rate of woods. CWD average storage in tropical rainforest and tropical monsoon forest is merely 19.96-27.71 t/ha which is the lowest among all the zones. On the contrary,CWD average storage in forest located in temperature marine climate zone is 205.8-213.2 t/ha, which ranks the highest. In the context of global warming, the atmospheric CO_2 concentration depends on the concentration of element C contained in CWD. To this end, the systematic research and long-term monitoring on forest CWD storage under each climate zone should be strengthened.