Ion source injected Interdigital H(IH) mode Linac has great potential to accelerate high current particle beam with high efficiency and low power consumption. One prototype of this accelerator was developed by Institute of Fluid Physics, China Academy of Engineering Physics. This accelerator was designed to accelerate protons from 0.04 MeV to 2.0 MeV with an IH cavity. The accelerator now has been constructed and tested. Beam test results show that the transmission is about 32.77%, and all parameters are consistent with the designed values, which proves the effectiveness and feasibility of this kind of accelerator.