Abstract: The paper analyzed relationships between output power, transmission efficiency and frequency, load and distance of four kinds of topology model of magnetically-coupled resonant wireless power transmission, and concluded: the topology with series connection of capacitor and inductance in transmitting coil, and parallel connection of capacitor and inductance in receiving coil is more suitable for conditions of low frequency, high load and long distance; the topology with series connection of capacitor and inductance in both transmitting coil and receiving coil is more suitable for conditions of relative short distance, high frequency and small load. Output voltage and current waveforms of four kinds of topology model under the same parameters were gotten by Matlab simulation, which verifies correctness of theoretical analysis.