The safety of energy storage equipment has always been a stumbling block to the development of battery, and sodium ion battery is no exception. However, as an ultimate solution, the use of non‐flammable electrolyte is susceptible to the side effects, and its poor compatibility with electrode, causing failure of batteries. Here, we report a non‐flammable electrolyte design to achieve high‐performance sodium ion battery, which resolves the dilemma via regulating the solvation structure of electrolyte by hydrogen bonds and optimizing the electrode–electrolyte interphase. The reported non‐flammable electrolyte allows stable charge‐discharge cycling of both sodium vanadium phosphate@hard carbon and Prussian blue@hard carbon full pouch cell for more than 120 cycles with a capacity retention of >85 % and high cycling Coulombic efficiency (99.7 %). Safety is always a topic of concern after reports of devices catching fire due to battery failure. Using non‐flammable electrolyte as an ultimate solution is difficult to be applied to commercial batteries because of various problems such as poor compatibility, high viscosity and so on. Here, we report a non‐flammable electrolyte with excellent comprehensive performance, and applied it to sodium‐ion pouch cells with different promising materials.