In this paper, the all-solid-state with high ionic conductivity electrolyte Li1.4Al0.4Ti1.6(PO3)4 (LATP) used for lithium-oxygen battery. The LATP has been successfully synthesized by Pechini-type method and characterized by X-ray powder diffraction analysis (XRD), field emission scanning electron microscopy (FESEM) and electrochemical performance. Through the analysis of electrochemical performance, LATP not only has high ionic conductivity, but also has a higher discharge platform as LATP solid electrolyte. At the same time, LATP solid electrolyte can reduce the decomposition of electrolyte, thereby reducing the generation of discharge products. Moreover, LATP solid electrolyte reduces the decomposition of the electrolyte, and thus reduces the formation of undesired discharge products. Therefore, the use of LATP glass ceramics for lithium Oxygen Batteries improves the thermal stability of lithium oxygen batteries and reduces the thermal expansion of lithium oxygen batteries. Therefore, LATP glass ceramic solid is used by lithium oxygen battery to improve the thermal stability of lithium oxygen battery and reduce the thermal expansion of lithium oxygen battery. The LATP solid electrolyte has a good prospect in the rechargeable lithium-oxygen battery.