Wireless charging receiving apparatus, wireless charging system and charging control method thereof

The invention relates to a wireless charging receiving apparatus, a wireless charging system and a charging control method thereof. The wireless charging receiving apparatus includes: a frequency modulation control module, a receiving resonance sensing module and a receiving control module. The frequency modulation control module is intended for pooling a plurality of preset states, detecting the peak value of a first output end of the receiving resonance sensing apparatus, and obtaining the best state from the polled preset states; the receiving resonance sensing module is intended for, on the basis of the best state, setting capacitance value in LC resonance so as to regulate the resonance frequency of the LC resonance, outputting the largest charging current by regulating and controlling a second output end, the LC resonance being formed in the receiving resonance sensing module; and the receiving control module is intended for conducting DC conversion on the largest charging current and then outputting th