Contactless power transmission (CPT) is of great superiority in mobile devices, minal, underwater applications due to its safety, convenience, high flexibility and low maintenance cost. This paper focuses on the analysis of SS-type contactless resonant converter (CRC) and SP-type CRC. The input-to-output voltage gain and the input impedance of both converters are discussed in detail. With the help of software Mathcad, the suitable control strategies for the converters are analyzed. For the SS-type CRC, nearly constant voltage gain and high efficiency can be obtained with self-oscillating control, by which the operation frequency is set at the higher voltage gain intersection. For the SP-type CRC, phase lock loop (PLL) control strategy is more suitable. Finally, a 60 W SS-type CRC and a 100 W SP-type CRC are fabricated and the experimental results verify the validity of the above analysis.