The invention discloses a method for protecting fiber splicing. The method performs triple flexible protection on optical fibers, and comprises the following steps: firstly protecting a to-be-spliced optical fiber with a loose sleeve; then applying elastic ultraviolet cure adhesive to the slicing point after splicing; and finally fixing a flexible protective sleeve on the ultraviolet cure adhesive in a thermal shrinkage manner. By adopting the method, an optical fiber can be whole protected after splicing, so that residual bubbles near the splicing point can be effectively avoided, and particulate impurities or pollutants inside the protective sleeve are prevented from directly contacting a naked optical fiber; the mechanical strength and bending resistance of the splicing point can be improved, and residual fiber storage can be favored. The method has the advantages of convenience in operation and residual fiber storage, good consistence and excellent economical performance.