Active power decoupling (APD) technology is an effective solution to store the double-line frequency ripple power in the single-phase system and remove the bulky aluminum electrolytic capacitors (Al E-caps). However, APD introduces power loss because of adding extra switches operating at high frequency, which hurts the system efficiency inevitably. Addressing this issue, this paper proposes an improved totem-pole PFC rectifier with active power decoupling. It injects a bidirectional switch between the PFC bridge and the decoupling bridge. Then, the grid current (the decoupling inductor current) can be used to achieve the soft switching of the decoupling circuit switches (the PFC circuit switches), thereby improving the efficiency of the converter. The proposed circuit is tested on a 500 W experimental prototype, and the results show a 1% increase in efficiency.