The effects of wrapped slurry recycled coarse aggregate on the properties of self-compacting recycled concrete by the mechanical properties and quick freezing and thawing cycle tests of self-compacting wrapped slurry recycled aggregate concrete.The compressive strength, split tensile strength and flexural strength of the test piece, the mass loss rate, compressive strength loss rate and relative dynamic elastic modulus of the test piece after freezing was analyzed,and combined with SEM electron microscopy test, the mechanism of improving the frost resistance of concrete by wrapped slurry aggregate is analyzed microscopically.The results show that,the conversion relationship between the split tensile strength, flexural strength and compressive strength of ordinary concrete and recycled concrete is not applicable to self-compacting wrapped slurry recycled aggregate concrete and the new relationship proposed in this paper is in good agreement with the experimental data.Wrapped slurry recycled coarse aggregate optimizes the physical performance of the aggregate, improves the transition area between the old and new concrete interfaces, enhances its compactness, and improves the frost resistance.When 42.5R cement slurry is used to wrap the aggregate, the frost resistance of concrete is the best. Although it is not as good as ordinary concrete, the relative dynamic elastic modulus of concrete increases by 18.6% after 150 cycles of freeze-thaw compared with the concrete of aggregate without wrapping slurry.The freeze-thaw damage model established based on the compressive strength and relative dynamic elastic modulus after freeze-thaw has a higher fitting accuracy, and can better reflect the freeze-thaw damage failure law of self-compacting wrapped slurry recycled aggregate concrete.