In this paper,the finite difference time domain method and the medium of equivalent refractive index concept.The transmission spectrum of triangular structure equivalent negative refractive index photonic crystals is studied.The study finds that the choice of a suitable frequency wave source in the equivalent negative refractive index of photonic crystals,as a result of Bloch-wave resonance，stimulated emission and photon tunneling has greatly enhanced the risk of spontaneous emission,and has been highly localized energy,thereby greatly enhances their transmission rate,which can be obtained the obviously Single-Wizard and the effects of all-optical switching,so the extensively application of efficient optical amplification,photonic crystal lasers and all-optical switches,etc.is expected to achieve.