The invention discloses a method for realizing explosion of an upper step of ultralong large-dip-angle tunnel anchorage. The method is characterized by including the following steps of (1) blast hole arrangement, (2) arrangement of a charging structure, (3) blast hole blocking and (4) design of a detonating network. Through implementation of the method, firstly, detonating is sequentially conducted for explosion so that explosives in holes can be smoothly detonated, and the better explosion effect is achieved accordingly; and secondly, in the tunnel anchorage explosion construction process, excavation vibration of all segmented anchorage holes cannot influence the safety of surrounding rock of first anchorage holes.