A piezoelectric bone conduction receiver and a portable electronic device are disclosed. The piezoelectric bone conduction receiver comprises: a piezoelectric bone conduction receiver driving unit functioning as an acoustic vibration element, a piezoelectric driving and signal processing circuit connected with the piezoelectric bone conduction receiver driving unit, and a driving signal switching module, wherein the piezoelectric bone conduction receiver driving unit comprises at least two piezoelectric bone conduction receiver driving modules which can be independently driven in operation, the at least two piezoelectric bone conduction receiver driving modules are connected to the driving signal switching module which is connected with the piezoelectric driving and signal processing circuit, and the driving signal switching module is configured to control phases of piezoelectric driving signals output by the piezoelectric driving and signal processing circuit to the piezoelectric bone conduction receiver driving modules, so that the phases of the piezoelectric driving signals received by the piezoelectric bone conduction receiver driving modules are same or opposite.