Abstract: After establishing the unmoveable sample plots in the growing zones of China, the terms such as stand structure factors, leading site factors and yield of 1-yr-old bamboos have been measured. According to the decided terms and categories as well as by using the quantitative theory I, the objective mark table of the number of 1-yr-old bamboos and the objective mark table of biomass of 1-yr-old bamboos have been worked out. Testing results show that two tables have very high precision. They can be used not only for predicting the yield of 1-yr-old bamboos but also for guarding the selection of suitable field for afforestation and adjusting current stand structure in order to gain a high yield.