The invention provides a silicon-aluminum waste chlorine ion curing agent, a preparation method and applications thereof, wherein 100 parts of the silicon-aluminum waste chlorine ion curing agent areprepared by carrying out wet grinding on the following components by weight: 30-40 parts of silicon-aluminum glass ball solid waste, 5-10 parts of carbide slag, 1-3 parts of an accelerator, 1-3 partsof a surface modifier, and the balance of water. According to the present invention, the silicon-aluminum glass ball solid waste is used as the main raw material, and is compounded with the carbide slag, and the accelerator and the surface modifier are added during the wet grinding, such that the silicon-aluminum waste chlorine ion curing agent has the high chlorine ion curing rate of more than 60% so as to provide the key material for the application of sea sand and coral aggregate in concrete.