Litterfall plays an important role in nutrient cycling and energy flow of forest ecosystems. In this paper, four common plantations of Acacia mangium, Acacia auriculaeformis, Pinus elliottii and Schima superba in south subtropical China were studied for their litter production and litter stock on the ground. Research site was in Heshan Hilly Land Experimental Station of Chinese Academy of Sciences (112°54′E，22°41′N). The plantations were set up in 1984. Monthly litterfall was monitored for 2 yrs starting in January 2002. Litter stock of forest floor was also estimated. Annual litterfall production was in a descending order: A. mangium (10.433 t/(hm²•a)), A. auriculaeformis (7.538 t/(hm²•a)), P. elliottii (6.445 t/(hm²•a)), S. superba (5.541 t/(hm²•a)). No significant difference of litterfall production between years was detected. Leaf litter accounted for 83.2% (A.mangium)～93.9% (P. elliottii) of total amount of the litterfall. Litterfall in first six months was stable. However, peaks occurred from July to September, which mainly resulted from fallen mature leaves by storms. Litterfall of corresponding months during the 2 years was very similar except some months with storms. Litterfall production of 3 plantations started to decrease when the plantations were at the age of 14. A.auriculaeformis behaved differently. Significant correlations between litterfall and temperature or precipitation were found only for A.mangium and P.elliottii. Litter stock of forest floor ranked as P. elliottii (13.81 t/hm2)>A.mangium (13.53 t/hm²)>A.auriculaeformis (6.46 t/hm²)>S. superba (5.02 t/hm²). High litter stock of A.mangium was derived from high litterfall and relatively slow decomposition, but P.elliottii mainly from low decomposability. Globally, at the region of low temperature, litter stock was much higher than annual litterfall production. At the region of high temperature and high precipitation, litter stock was generally lower than annual litterfall. Pine was an exception in that the litter stock was higher than annual litterfall production in different regions.