The method of interlayer alleviation to mitigate fiber print-through phenomenon in carbon fiber reinforced polymer (CFRP) mirror replication process was presented. Using traditional method and interlayer method in CFRP replication technique respectively, two mirror samples have been fabricated and measured by step tester along and perpendicular to the fiber direction. The results show the fiber print-through phenomenon is available perpendicular to the fiber direction. In small range area, the alleviation layer obviously mitigates the print-through phenomenon with the surface roughness less than 50nm. Although the surface error exists in large range area, it is still better than that by traditional methods.