The invention provides a USB microphone for wireless transmission, which relates to the specific application in the field of U-band wireless transmission. It is a USB microphone for wireless transmission, comprising a holder and a base shell. The top of the holder is attached to the fixing frame by screws. Within the fixing frame there is a mute button attached by screws, a microphone core and lithium batteries. The first PCBA board is screwed inside the fixing frame. The second PCAB board is screwed inside the base shell, and it is provided with an output for USB at one end. A face shell is set on top of the base shell. By combining UHF wireless transmission with a USB microphone, the invention frees the USB microphone from the length of the USB cable and enables USB transmission of digital signals for recording while being used wirelessly.