The structure of parallel LLC resonant converter is very suitable for use of low voltage and large current. But the difficulty lies in the current sharing between modules. The small difference in the parameters of the resonant network may cause the larger current imbalance of the module. In this paper, from the point of view of impedance, the virtual impedance is used to simulate the series impedance of the resonant network. To improve current sharing, the equivalent circulating current is limited by the virtual impedance. The control block diagram and the realization method based on the virtual impedance are given. Finally, a prototype of a two-phase parallel LLC resonant converter with 400 V input and 12 V/80 A output is built.