Wireless power transfer (WPT) has become a popular research interest in power electronics eld in recent years. In many applications, the WPT systems are required to output constant current which is free from the constraints of self-inductances of the loosely-coupled transformer coils and is not affected by the load conditions. This paper proposes an electromagnetic inductive power transmission system based on S-LCL compensation network and its corresponding parameters tuning method. By reasonably setting the compensation parameters of the system, it can achieve constant current output and nearly zero-phase angle (ZPA) operation. Zero-voltage switching (ZVS) of the MOSFETs can also be realized by adjusting the value of compensation parameters. An experimental prototype with 50 V input voltage and 4 A output current is fabricated to validate the correctness of the theoretical analysis, and the maximum power transmission efficiency of the system is up to 92.8%.