Fuzziness in legislative language is inevitable. On the basis of distinguishing between “fuzziness”, “ambiguity” and “generalization”, through an exhaustive investigation of the ambiguity in the self-built corpus of current Chinese legislative language, we can see that the fuzzy phenomenon in legislative language can be divided into fuzziness in expression and that in content. Fuzziness in expression is manifested in nouns, adjectives and verbs; fuzziness in content is manifested in pronouns and particles. The fuzzy phenomenon in legislative language is for legal conciseness as well as legal extensibility. In view of the negative impact of fuzzy phenomenon, from the perspective of legislative technical norms, normative measures such as “avoiding unnecessary fuzzy words”, “listing relevant information”, “supplementing clauses” and “judicial interpretation” should be adopted to clarify the fuzzy information.