基于创新能力、创新质量、创新实效、创新贡献四个维度构建高校现代化评价体系，测度城市群内各城市在本地贡献与跨城市溢出下的知识创新综合水平。运用广义极值分布拟合、无条件分布估计等方法分析城市评分的分布模式与时空演变特征，进一步通过Dagum基尼系数分解探究差异来源，并借助空间计量模型检验时空收敛与首位城市引领的演化机制。研究发现，城市知识创新水平呈现显著的右偏重尾分布，且极化趋势随时间增强，空间差异主要源于城市群之间的板块性差距。城市群内部则同时存在条件收敛趋势和首位城市的显著空间溢出效应，表明演化过程受追赶效应与辐射作用共同驱动。研究揭示了中国城市知识创新“整体差距固化于区域板块、局部演化受收敛与溢出效应双重驱动”的总体特征，为“十五五”时期一体推进教育科技人才发展以及强化高校对区域创新的实效与贡献提供实证依据。

Based on the four dimensions of innovation capacity， innovation quality， innovation effectiveness， and innovation contribution， a modernization evaluation system for higher education institutions is constructed to measure the comprehensive level of knowledge innovation within urban agglomerations， considering both local contributions and cross-city spillovers. Methods such as generalized extreme value distribution fitting and unconditional distribution estimation are employed to analyze the distribution patterns and spatiotemporal evolution characteristics of city scores. Furthermore， the Dagum Gini coefficient decomposition is used to explore the sources of disparities， and spatial econometric models are applied to examine spatiotemporal convergence and the evolutionary mechanisms driven by leading cities. The study finds that the level of urban knowledge innovation exhibits a significant right-skewed heavy-tailed distribution， with polarization trends intensifying over time. Spatial differences primarily stem from inter-regional disparities among urban agglomerations. Within urban agglomerations， conditional convergence trends and significant spatial spillover effects from leading cities are observed， indicating that the evolutionary process is jointly driven by catch-up effects and radiation effects. This study attempts to reveal the overarching characteristic of knowledge innovation in Chinese cities—"overall disparities entrenched in regional blocks， with local evolution driven by both convergence and spillover effects." It provides an empirical basis for the integrated advancement of education， technology， and talent development during the 15th Five-Year Plan period， as well as for strengthening the effectiveness and contribution of higher education institutions to regional innovation.