Abstarct: Phosphorus the most important nutrient after nitrogen is required for plants. Chemical fertilizers are major sources of phosphorus for plant, but due to the complexity of phosphorus in different soils. Less than 20%of phosphorus fertilizers applied to soils is absorbed by the plants root, and the other is stabilized in soils. Application of organic materials such as biochar to the soils is one of effective methods to decrease the precipitation of phosphorus fertilizers in the soils. According to investigation on effect of biochar enriched with phosphorus on some chemical properties of soils and yield of corn an experiment was conducted in 2014 at the University of Shahrood. Experimental design was baxsed on randomized complete block design with three replications. Treatments we including, control and 2 levels of biochar (2 and 4 ton per hectare) and 2 levels of biochar enriched with phosphorus (2 and 4 ton per hectare) and phosphorus fertilizer and biochar with phosphorus. In order to measuring some chemical properties of the soils, three soil samples were collected during the growing season. The results showed that application of biochar enriched with phosphorus increased significantly (p<5%) seed and root phosphorus and seed yield. Application of both biochar and phosphorus fertilizer enhanced available and soluble phosphorus, stem height, dry weights of stem, leaf and root.