A chemical method with low cost and easy process is used to fa bricate the fiber surface-enhanced Raman scattering (SERS) probe modified by silver nanoparticles.In order to analyze the Raman enh ancement characteristics of fiber SERS probe, Raman experiments were carried out using rhodamine 6G (R6G) as probe molecules ( with concentration of 10－7mol/L to 10－9mol/L).The concentration limit is as low as 10－9mol/L.Meanwhile,the time-course SER S m apping experiment (with concentration of 10－6mol/L R6G solution) is investigated to study the Raman enhancement characteristics of the fiber SERS probe.We also analyze the effect of probe molecules solution evaporation process on the Raman enhancement characteri stics.The results indicate that the as-prepared fiber SERS probe has no inhibition on fluorescent noise in fl uenced by probe molecule solution status and test method.This fluorescent noise can influence the Raman spectrum tested by fiber SERS probe greatly.When the solution is sufficient (the fiber SERS probe is soaked in probe molecules solution),the fluorescence noise and the effective Raman signal are both large.During drying process,the f luorescence noise and effective Raman signal are red uced effectively,while the amplitude of fluorescent noise decreases greater than the effective Raman signal.