The invention provides a constant-voltage constant-current WPT system based on an LCL-LCC compensation network and a parameter design method thereof. A primary side circuit of the system comprises a high frequency inverter circuit and an LCL compensation network. A secondary side circuit comprises an LCC compensation network and a load. The primary side circuit uses constant current output. The secondary side circuit uses constant voltage output. A transmitting coil Lp2 and a receiving coil Ls are coupled to each other to realize radio energy transmission. Compared with a traditional radio energy transmission system, the novel circuit topology reduces voltage regulation links and reduces the system complexity. In WPT system design, in order to improve the load capacity of the system, the voltage output from the system to the load is usually required to be approximately constant when the load is cut in and out and changed. Through experimental verification, the system can still meet therequirements of constant current of a primary side coil and constant voltage of the secondary side load under the condition that the load changes by 50%, which meets the requirements of practical applications.