The invention discloses a method for compounding organphosphorus by using black phosphorus. The method takes the black phosphorus as a reaction raw material, safely and efficiently compounds organic phosphate, sulpho-phosphite ester, amino phosphite ester, alkylphosphine, alkylphosphine oxide and other organphosphorus with wide usages, a conventional synthsis route by using phosphorus halide and phosphate to compound the organphosphorus is avoided, the synthesis steps are simple and short, the production technology is operated simply and easily, the reproducibility is good, the reaction is simple and green, the use of a phosphorus halide reagent is avoided, the range of the synthetic organphosphorus is wider, the method satisfies the requirements of green chemical development, and the large-scale production can be achieved.