A high frequency receptacle connector has an insulating housing, multiple first terminals, multiple second terminals, a shell and a plug detecting assembly. The first and second terminals are mounted on the insulating housing and capable of implementing USB3.0 protocol. The shell covers the insulating housing and terminals. The plug detecting assembly has a first detecting terminal and a second detecting terminal. The first detecting terminal is mounted on the insulating housing. The second detecting terminal is mounted on the insulating housing and selectively bends to contact or isolate from the first detecting terminal. The high frequency receptacle connector is capable of providing electric power under a power-saving mode of a PCB on which the high frequency receptacle connector is mounted.