The invention discloses a special valve system for erosion prevention protective layer construction of a concrete foundation in a saline soil area. The special valve system comprises a special one-way valve system made of an aluminum alloy material for a bottom end and a special one-way valve system made of the aluminum alloy material for a side direction; a plurality of grouting holes are formed in pipe bodies of the special one-way valve system for the bottom end and the special one-way valve system for the side direction; two sealing protective layers are arranged outside the pipe bodies; and external threads are arranged at connecting ends of the pipe bodies and are used for connecting with slurry inlet pipelines. The special valve system for construction, provided by the invention, is simple and convenient in principle and is high in working reliability; and a one-way control function can be guaranteed during the whole working period, and liquid can be effectively prevented from refluxing. By means of the special valve system for construction, provided by the invention, erosion prevention slurry can be reliably and stably injected into a periphery of the concrete foundation in the saline soil area and a stratum, and an effective erosion prevention protective layer is formed at the periphery of an underground structure.