The invention belongs to an electronic technology and the field of wireless communication, and relates to a modulated wave wireless microphone, which consists of a direct current (DC) power supply, an audio signal pickup circuit, an audio signal primary amplification circuit, an audio signal secondary amplification and negative feedback circuit, a modulated wave oscillation and transmission circuit and a frequency stabilization circuit. At present, the number of frequency modulated wireless microphones is great; however, ordinary amplitude modulated radios are most frequently used by users in society, so the promotion and popularization of the modulated wave wireless microphone become a top priority. The modulated wave wireless microphone may play a significant role in occasions such as conferences, music teaching and the like. Acoustical signals can be converted into amplitude modulated radio signals and transmitted by the modulated wave wireless microphone, and after the amplitude modulated radio signals are received by the ordinary amplitude modulated radio, modulated waves are recovered into the acoustical signals for playing. The modulated wave wireless microphone has stable oscillation frequency and the maximum transmission radius of 9m, and frequency is difficult to offset, so interference in the radios in the vicinity may not be produced. The modulated wave wireless microphone is not required to be externally connected with a transmitting antenna so as to be greatly convenient for a user to use.