Abstract: Two soils which collected from main peanut cultivated areas in Guangdong Province were utilized to investigate the effects of B or/and Mo application on the growth, development and yield of peanut by pot culture experiments The results indicated that application of B, Mo or both combination could significantly increase the content of chlorophyll and intensity of photosynthesis The dry matter of peanut in flowering and fruiting stage were all increased by the application of B or/and Mo, and was necessary for high yield of peanut