A magnetic coupled wireless power transmission system with high wireless transmitting efficiency by utilizing the four-coil parallel resonant unit is proposed. The advantages of the four-coil magnetic coupling unit in the quality factor and adjustability are analyzed. A hybrid simulation method, which integrates the multi-physical simulator COMSOL with the circuit design software Multisim, is utilized to analyze the magnetic coupling unit and the transmitting circuit. For this magnetic coupled wireless power transmission system, its source and load coils are designed to be single-turn coil with a radius of 9 cm, the transmitting and receiving coils are 13 cm four-turn ones, and the distance between the transmitting and receiving coils are 40 cm, correspondingly 1.5 times the coils’ diameter. Measurement results demonstrate, the wireless power transmission system has a resonant frequency of 4.78 MHz, and achieves a high DC-AC wireless transmission efficiency up to 96.7%.