Bragg resonance phenomena, occurring as waves propagating from the sea to shallow water under particular topographic conditions, were studied to provide a scientific basis for the design of estuarine and coastal protection engineering and the forecast of morphodynamic evolution. The definition and characteristics of wave Bragg resonance as well as the significance of research are introduced, and the pros and cons of four approaches for study of the phenomena are reviewed, including field observation, theoretical analysis, numerical simulation, and experimental investigation. Major achievements regarding the types of wave Bragg resonance, the formulas of the low-order resonance reflection coefficient, and high-order resonance numerical simulation are summarized. Three important topics for further intensive study are proposed, including the negative drift of dominant frequency, the characteristics of the irregular wave Bragg resonance, and the generation mechanism of Bragg resonance under wave-current interactions.