The return for supplementary investigation is set up by returning supplementary inquiry as the prototype，the principle basis of the return supplementary investigation is related to the basic laws such as the rotation in the same stage of the procedure and the relationship between investigation and prosecution.The nature of the current duty crime investigation is difficult to interface with the above-mentioned procedural principles，and the return of supplementary investigation as a system variant has a difficult logical dilemma. You can try to explore solutions in two directions：either to conduct a homogeneous interpretation of the investigation of duty crimes and the investigation in criminal proceedings，and to incorporate them into criminal proceedings；or to change the way of handling the result of examination and prosecution of duty crime cases.