Nanobelt Ca 0.68 Si 9 Al 3 (ON) 16 : Eu 2+ luminescence fibers for wear detection of disc cutter were prepared by a simple process electrospinning combined with gas-reduction method, and then characterized by FE-SEM, XRD, PL, and universal material testing machine. The obtained sample keeps fiber film state in micro and macroscopic level with a certain mechanical strength, temperature, waterproof and chemical stability. XRD patterns of the sample doped with Eu 2+ 0.1 nitrided at 1500℃ for 4 h were crystallized well and assigned to Ca 0.68 Si 9 Al 3 (ON) 16 in JCPDF card. The fiber film can be effectively excited by blue light, showing a broad emission spectrum in the range from 400 to 700 nm. The luminescent fiber film can be practically assembled onto disc cutters for detection. The wear degree of each cutter can be real-timely