The changes in gel characteristics, rheology and antioxidant properties, microstructure and water mobility were studied to investigate the potential use of flaxseed oil double emulsion to replace pork back-fat (25%, 50%, 75% and 100%) in reduced-fat pork batter. The flaxseed oil double emulsion (pH 6.0) was made of 20 mL 0.5% tea polyphenol solution (w/w), 20 mL flaxseed oil, 60 mL 4% whey protein (w/w) and 400 mL 2% Arabic gum solution. The result showed that the TBARS, L * , and a * values of pork batter significantly decreased (P < 0.05) when the flaxseed oil double emulsion replacing the pork back-fat was ≤50%. Meanwhile, the pH, emulsification stability, hardness, springiness, gumminess, chewiness, cooking yield and G 0 at 80 °C significantly increased (P < 0.05). In addition, the mobility of water in cooked batter first decreased and then increased (P < 0.05) with increasing flaxseed oil double emulsion. In addition, the microstructure of cooked pork batter with 50% flaxseed oil double emulsion has a continuous, tighter and regular structure, with the pores being smaller and more uniform. Overall, the replacement of pork back-fat with flaxseed oil double emulsion at 50% reduced-fat content could improve the quality of pork batter.