Double-pipe protecting borehole wall balsting,a new control blasting technology, is put forward and defined, which aims at resolving the problems existing in conventional smooth blasting and directional fracture controlled blasting. The characteristics of the new blasting technology, matching sets and explosion mechanism are detailedly introduced in the paper.The results of experiment on single borehole model blasting and tunnel digging testing indicate that it has very good blasting effect. As a result of high speed photography, crannies are initiated and propagated and concrete medium are fractured in controlled direction. Invention and application of its technology provide an effective and convenient way to obtain good effect of slope excavation and trunnel driving. It shows a bright prospect of widespread applications.