The influences of 4 factors on the frost resistance of recycled concrete,including the mix quantities of fly ash,mineral powder,polypropylene fiber,and regenerated aggregate,were studied by the orthogonal testing method.The optimal ratio which meets the demands of good frost resistance was obtained by analyzing the mass loss rate and relative dynamic elastic modulus of concrete.Meanwhile,the analysis on the stress-strain curves of concrete with optimal mixture ratio,ordinary concrete (reference group) and recycled aggregate concrete (control group) was carried out to examine the rationality of the optimized result.