数字技术是数字经济发展的核心驱动力，通过推进数字产业集聚加快数字技术创新突破，是数字经济条件下加快科技自主创新、实现科技自立自强的重要途径。本文基于2003—2021年县域面板数据，利用工商注册数据测度数字产业集聚发展水平，并构建固定效应模型分析其对数字技术创新的影响机制和效应。研究结果表明，数字产业集聚显著促进了数字技术创新，该结论在一系列稳健性检验后依然显著成立。数字产业集聚主要通过劳动力蓄水池、技术溢出和数字中间投入共享促进了数字技术创新。异质性分析表明，在县域市场潜能、营商环境和对数字技术的关注度较高，以及县域内竞争程度较低的条件下，数字产业集聚对数字技术创新的促进作用更为显著。进一步分析还发现，现阶段我国数字产业集聚对企业全要素生产率和行业内部资源配置产生了显著的正向影响，但未来需要重点关注数字制造业集聚对数字技术创新的赋能效应不强以及数字产业集聚可能导致的县域发展质量不高、发展不平衡和环境污染问题。本文丰富了数字时代下产业集聚的创新效应研究，核心结论对进一步推进数字产业集聚，加快推进科技创新，实现高质量发展具有重要的政策启示。

Digital technology is the core driving force of the digital economy. Advancing digital industry clusters （DIC） and accelerating breakthroughs in digital technology innovation （Diginno） are important ways to enhance independent innovation in science and technology and achieve self-reliance in technological strength under the conditions of digital economy. Based on county-level panel data from 2003 to 2021，this paper uses business registration data to measure the development level of DIC and constructed a fixed-effects model to empirically analyze its impact mechanisms and effects on Diginno. The results showed that DIC significantly promotes Diginno，and this conclusion remains robust after a series of robustness tests. DIC mainly promote Diginno through labor pooling，technology spillovers，and sharing of digital intermediate inputs. Heterogeneity analysis indicates that the promotional effect of DIC on Diginno is more significant under conditions of high market potential，favorable business environment，high attention to digital technology，and low competition within counties. Further analysis also revealed that the current DIC in China have a significant positive impact on the TFP of enterprises and the internal resource allocation within industries. However，future attention should focus on the weak empowering effect of digital manufacturing clusters on Diginno as well as the problems of poor quality of county development，unbalanced development and environmental pollution that may result from DIC. This study enriches research on the innovation effects of industrial agglomeration in the digital era. Its core findings will provide important policy implications for further advancing DIC，accelerating scientific and technological innovation，and achieving high-quality development.