Optical switching behavior is presented for the weak probe field applied to the solid-state quantum dot system,which is driven by a strong control field and is coupled with a single nanomechanical resonator.The research results show that it is possible to change the coupling strength of quantum dots with nanomechanical resonator to control optical switching when the driving field is detuned from the quantum dot.It is found that the behavior of optical switching can be obtained via modulating the Rabi frequency of the control field at the presence of the nanomechanical resonator,The responsible physical mechanism is the existence of auxiliary energy levels with the help of the nanomechanical resonator and the occurrence of electromagnetically induced transparency via the control field.The adopted solid-state quantum system plays an extremely important role in the macroscopic quantum state and the optical switching in such a system has the potential applications in optical communications,photonics and nonlinear optics.