Abstract: The NASCION-based gas sensor have received wide attention from researchers for their advantages of fast response, high sensitivity and good stability.Compared to other solid electrolytes, NASCION Solid electrolyte (Na_1+xZr₂Si_xP_3-xO₁₂(0≤x≤3)) belongs to the sodium superion conductor and has excellent Na⁺ conductivity.In recent years, there are many research papers on NASCION-based gas sensors at home and abroad, but there are few review articles.This paper summarizes the principle of NASCIONbased electrochemical gas sensors and summarizes the progress of NASCION-based gas sensors on NO_x, SO₂, and CO₂, etc.The effects of the sensitive electrode material and the sensor structure are also described in detail, and prospects the field of the gas sensor of the NASCION-based solid electrolyte.