A multiway switch, a radio frequency system, and a wireless communication device are provided. The multiway switch is applicable to a wireless communication device being operable in a single-frequency single-transmit mode. The multiway switch includes five T ports and 2n P ports. The five T ports are configured to be coupled with a radio frequency circuit. The 2n P ports are configured to be coupled with an antenna system comprising 2n antennas. The five T ports include one first T port coupled with all of the 2n P ports. The multiway switch is configured to be coupled with the radio frequency circuit and the antenna system to implement a preset function of the wireless communication device of transmitting a sounding reference signal (SRS) through 2n antennas corresponding to the 2n P ports in turn.