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In this paper, we study a delayed predator-prey model with impulse and, in particular, the existence of the predator-free periodic solution. We employ the approach and techniques coming from epidemiology and calculate the basic reproduction number for the predator. Using the basic reproduction number, we consider the global attraction of the predator-free periodic solution and uniform persistence of the predator. Our results improve the results by Liu (Adv. Differ. Equ. 2016:42, 2016), wheredoi:10.1186/s13662-018-1895-1 fatcat:irv3ahhysvenplrx5zbgnkntpm