This method is applicable for determining the frost resistance of concrete specimens in an atmospheric environment and in contact with salt, as indicated by the number of freeze-thaw cycles they can withstand, the mass of surface spalling, or the relative dynamic elastic modulus measured by ultrasound. The NELD-FS810 Concrete Single-Sided Salt Frost Tester, developed by Beijing Naidel Co., Ltd., has been used by users from scientific research institutions, universities, and other fields for an extended period, confirming its high reliability. It provides significant quality assurance for long-term and durability tests of concrete, and can meet the needs of research institutions, colleges and universities, design and construction departments, quality inspection, and other sectors for rapid salt frost testing of concrete.