The invention provides a method for constructing environment-friendly enclosing walls from building garbage, and relates to the technical field of building garbage recycling. By the aid of the method,the problem of high building garbage recycling cost in the prior art can be solved. The method includes steps of S1 screening and classifying, S2 crushing and separating, S3 reinforcing steel bar shaping, S4 foundation reinforcing, S5 abutment constructing, S6 reinforcing steel bar frame placing and S7 wall filling. The method has the advantages that foundations are reinforced, abutments are constructed, walls are poured, wall frameworks are arranged, and large quantities of building main materials and reinforcing steel bars which are generated in disassembling fields are utilized, and are low in reprocessing difficulty and recycling cost and short in recycling period.