The CADS demo facility is aimed to build a prototype linac for the low energy part of the continuous wave(CW)superconducting proton linac and demonstrate technology in this section[1].In the CADS roadmap,the realization of 25 MeV 10 mA beam is a key point.Thus,based on the 10 MeV CADS Injector II at IMP,IMP and IHEP will both contribute a cryomodule to reach 25 MeV at the site of IMP[2].To dump the beam from the linac,we build a new high energy beam transport line with bending angle of 90°,to avoid back-scattering gamma and neutron beams to damage the linac.Fig.1 shows the layout of the 25 MeV demo facility.