Abstract: Biochar as a soil amendment to improve soil environment and remediate contaminated soil has become one of the research hotspots in the field of agriculture and environmental protection. The types and characteristics of biochar, the effects of biochar application on soil physical properties (bulk density, porosity, water holding capacity, aggregate stability, etc.) and chemical properties (pH, nutrients, carbon cycle, etc.) were introduced. The adsorption mechanism of biochar for remediation of organic contaminated soil was expounded. The biochar remediation efficiency was analyzed from three aspects, including biochar physical and chemical properties, organic biological properties and adsorption environment. The effects of biochar on the environmental behavior of organic pollutants in soil were discussed, and the existing problems and future research directions were prospected.