A simultaneous wireless power and information transmission （SWPIT） technology based on 16-quadrature amplitude modulation （16QAM） is proposed to achieve efficient and synchronized transmission of both power and information over a single transmission channel.The technology integrates a wireless power transfer module，a signal generation module，a transmission control module，and a signal acquisition and demodulation module to work in concert.It utilizes phase-shift control for stable transmission and soft switching operation during independent power transmission.By combining the 16QAM and the sinusoidal pulse width modulation （SPWM） technology during synchronized transmission of power and information，it also resists channel interference and ensures the accuracy and reliability of information transmission.The system can automatically switch between two transmission modes according to the transmission requirements，and its performance in practical applications is validated by establishing an experimental platform.It demonstrates low error rates and efficient and stable power and information transmission capabilities，thereby proving the feasibility and practicality of the proposed system.