The invention discloses a wireless electric power and signal transmission system for spacecraft rendezvous and docking parallel-operated power supply. One or a plurality groups of wireless electric power transmission units are configured on a spacecraft rendezvous and docking mechanism; each group of transmission units consist of electric power transmitting devices and electric power receiving devices. Wireless transmission of electric power and signals can be achieved by using a technique based on electromagnetic induction principles, under same power transmission conditions, the weight and the size of the system are equivalent to those of a wired electric power transmission mode, the electric power transmission efficiency of the system is greater than 85%, that is, the electric power transmission efficiency is higher than that of the wired transmission mode. By adopting the wireless electric power and signal transmission system, the problems that a power supply mode of a conventional electric connector has high abutting precision requirements, abutting interface design is complex, potential hazard of electric sparks can be caused as contact metal is exposed, and the like, can be solved.