本文首次研究了ＺｎＳｅ－ＺｎＴｅ多量子阱在室温下的反射型皮秒激子光双稳，实验结果表明，ＺｎＳｅ－ＺｎＴｅ多量子阱在室温下的反射型皮秒光双稳的阈值光强和对比度分别为１．１ＭＷ／ｃｍ２和６：１．根据测量得到的ＺｎＳｅ－ＺｎＴｅ多量子阱在室温下的激子吸收光谱及激子的非线性吸收理论，归结ＺｎＳｅ－ＺｎＴｅ多量子阱室温下的皮秒光双稳的主要非线性机理为ＺｎＳｅ－ＺｎＴｅ多量子阱的激子饱和吸收引起的折射率变化． In this paper, we first study the reflective picosecond excitons optical bistability of ZnSe-ZnTe MQWs at room temperature. The experimental results show that the threshold light intensities of the reflective picosecond bistable of ZnSe-ZnTe multiple quantum wells at room temperature and The contrasts are 1.1 MW / cm2 and 6: 1, respectively. According to the measured exciton absorption spectra of ZnSe-ZnTe MQWs at room temperature and the nonlinear absorption theory of excitons, the main nonlinear mechanism of picosecond light bistability of ZnSe-ZnTe multiquantum wells at room temperature is ZnSe- Change of Refractive Index Induced by Exciton Saturation Absorption of ZnTe Multiple Quantum Wells.