In order to investigate the coupling effect of chloride ions and cracks on the corrosion of reinforcement in coral concrete,we employ electrochemical experiments to compare with the corrosion state changing law of reinforcement in coral concrete component with different exposure time in chloride environment and width of prefabricated cracks,and analyze the influence mechanism of chloride ions and cracks on the corrosion of reinforcement in coral concrete by X-ray diffraction (XRD) and scanning electron microscope (SEM) tests.The results show that the risk of reinforcement corrosion increases with prolonged exposure time and wider prefabricated cracks.A significant impact on steel reinforcement corrosion is observed only when the width of pre-existing cracks surpass a certain threshold value.Furthermore,an increase in the width of prefabricated cracks is led to a shift in corrosion products from predominantly magnetite to primarily akaganeite and hematite,and accompanied by a transformation in the microscopic morphology towards a rough and irregular appearance.