Proposed a digital quadrature architecture without delay calibration filter and analyzed it’s performance, analyzed the frequency offset’s impact on the phase and phase difference. The simulation results shows that high Image Rejection Ratio (IRR) can be acquired when the frequency offset is little; otherwise, the phase difference error can be reduced by accumulating the multi-point phase differences. The proposed architecture has some advancements as simple, faster processing speed and easy to hardware realization, which could be widely applied, such as radar, electronic reconnaissance and so on. Applying this structure to the design of multi-channel digital receiver may decrease the occupation of the hardware resource to some extent, at the same time, satisfy the real time processing of the signal.