With the shortage of available fossile resources, the development and utilization of renewable energy sources has become significantly important. Energy is one of the basic concept of ecological functions. Plant caloric value,one of the most important characteristics of a fuel, can reflect the solar radiation energy utilization in plant and also be also be used as plant growth status of an effective index. Plant caloric value is termed as heat emitted by plant dry matter after completely combusting which reflects the capability of solar energy conversion in plants. So that caloric value is an effective index of plants energy production. Gross caloric values, ash free caloric values and ash contents as well as growth quantity and biomass of five clones of Robinia pseudoacacia seedling stage and organs in hilly areas of the West of Henan Province were determined using calorimeter and muffle furnace. The results showed as follows: all of the five clones have the different growth rhythm and different accumulation rate in different organs, and dry weight in the last season decreased in the order of 3-I, 83002, 84023, 8044 and 8048.The decreased order in different organs of gross caloric values and ash free caloric values of five clones were different. The 8044 clone had the largest average gross caloric values and average ash free caloric values of leaves and branches, which were 19.31, 21.18 kJ/g and 18.00, 19.39 kJ/g respectively. The largest average gross caloric values of trunk and average ash free caloric values of trunk were from 8048 and 83002, which were 18.72 kJ/g and 19.12 kJ/g respectively. Both average gross caloric values and average ash free caloric values of barks of 83002 were the largest, which were 17.77 kJ/g and 19.29 kJ/g, respectively. In brief, the gross caloric values of unit mass of standard wood went up first of all and then decreased. The caloric values of 83002, 3-I and 84023 in unit area were the largest.