[Objective] We aimed to study the effects of BGB microbial agents on the survival rate of Pinus tabulaeformis afforest, height of tree and growth of ground diamete, and investigate the changes in soil nutrient and water content with the utilization of BGB microbial agents, in order to provide theoretical basis and technical support for vegetation restoration in Loess Plateau.[Methods] We applied three different amounts of BGB microbial agents at different slopes to observe its influence on P. tabulaeformis and soil nutrient.[Results] The BGB microbial agents not only significantly increased the survival rate of plant and promoted the height of tree and the growth of ground diameter, but also dramatically increased soil nutrient content and water content. And this effect decreased as the soil was deeper and the slope was steeper. Moreover, BGB microbial agents influenced soil available phosphorus and organic matters significantly, and improved soil water content dramatically, especially at the depth of 20-40 cm.[Conclusion] BGB microorganism bacterium agent has a significant effect on the survival rate and amount of growth of P. tabulaeformis afforest and soil nutrient.