In order to eliminate the circulation current resulted from the parallel operation between an electronic power transformer（EPT） and a conventional power transformer（CPT）， an idea that the secondary voltage of CPT is selected as the reference of EPT's output voltage is proposed based on the analysis of parallel principle of an EPT and a CPT. A novel parallel control strategy on the basis of the proposed idea is presented and its control characteristic is also discussed in detail. The proposed strategy based on traditional proportional integration（PI） control consists of the reference voltage feed-forward， the instantaneous output voltage and the instantaneous capacitance current feedback loops. Theoretical analysis indicates that the proposed parallel control strategy has good steady-state accuracy and fast dynamic response compared with the traditional PI control strategy. A detail computer simulation with MATLAB/Simulink for the parallel operation of an EPT and a CPT is conducted， and this parallel system is also implemented in laboratory based on the digital signal processor（DSP） of TMS320F2812. Simulation and experimental results show that the proposed parallel control strategy has good current-sharing regulation characteristic and fast dynamic response， and achieves reasonable load distribution in the proposed parallel system with different ratings.