Abstract: This invention is a wireless USB keyboard which comprises a signal encoding device between the keyboard switch key assembly and an emitter RF module. Pressing a keyboard matrix data switch encodes the data as data code for transmission. The emitter RF module transmits the signal to the receiver end, and it is transmitted to a computer via a USB port after decoding. The wireless USB keyboard, which transmits signals to the receiver end after encoding, can effectively transmit key matrix data, which prevents the keyboard signal from interfering with other wireless peripheral devices.