[Purposes] Due to insufficient research on the incipient velocity and sediment transport of coral sands,interior flume experiment was carried out to study the laws of incipient motion and transport properties of coral sands under the constant flow. [Methods] The relationship between the shaft length and the sieving particle size of the coral sand was determined by using electron microscopy, and the starting flow rate and sand transport rate of coral sand were measured by modern measurement technology. [Findings] The classic quartz sand incipient velocity formula and sediment transport rate formula are compared and analyzed, and the empirical formula is revised, which makes it suitable for calculating coral sand incipient velocity. [Conclusions] The coral sand is characterized by high porosity and poor psephicity. Compared with quartz sand of the same sieving particle size, the incipient velocity of coral sand is slower. As the water depth increases, the sediment transport rate of coral sand with a single wide bed load decreases significantly. The results of this study further enrich the sediment transport theory.