促进中小企业专精特新发展，是典型的“政策工具包驱动型发展范式”。政策优化的关键在于考虑“工具-主题-效力”三者的动态适配性关系。本文基于公共政策评估理论，运用政策文本挖掘和文本量化研究方法，对2006—2024年长三角、珠三角的466份专精特新系列政策文本进行了比较分析与评价。研究发现，总体上，政策工具的选择与配置存在偏好、过度与缺失以及比例失衡等问题；政策主题与发展坐标的锚定存在滞后性、协同性不足等；政策效力存在从可接受性到进一步优化的路径。对此，应持续调整优化专精特新企业发展的政策体系，以优化工具结构、创新性思考政策主题和设计、打好政策补丁三方面为抓手，从而系统推进专精特新政策的设计革新。本研究旨在为提升专精特新政策设计的系统性和科学性提供优化路径，也为公共政策理论研究提供方法参考。

Promoting the development of "specialized，refined，distinctive，and innovative" （SRDI） small and medium-sized enterprises is a classic policy-instrument-driven development paradigm. The key to SRDI policy optimization lies in considering the dynamic alignment among policy instrument，policy theme，and policy effectiveness. Drawing from public policy evaluation theory，this study employed text mining and quantitative text analysis to conduct a comparative analysis and assessment of 466 SRDI-related policy texts from the Yangtze River Delta and Pearl River Delta regions spanning 2006 to 2024. The results indicated that the selection and configuration of policy instruments face issues including preferential biases，overuse，omission，and disproportionate allocation； the policy themes and anchoring of development positioning suffer from lag effects and insufficient synergy； and there is a pathway for further optimization in policy effectiveness. In response，the continuous adjustment and optimization of the policy system supporting the development of SRDI enterprises should focus on three key aspects:optimizing the structure of policy instruments，innovatively rethinking policy themes and design，and effectively addressing policy gaps. By leveraging these three aspects，the reform and innovation of policies for SRDI enterprises can be advanced through a systematic approach. This study aims to provide an optimization pathway for enhancing the appropriateness and scientific rigor of the SRDI policy design，and to offer methodological references for public policy research as well.