To explore response of plant diversity of urban remnant mountains (URMs) to its surrounding urban spatial morphological (USM), nine URMs embedded in the built-up area of Guiyang City were selected as the research objects by kernel density method. The total of 99 plant diversity survey plots were set up by the combination way of slope direction and slope position. Taking the edge line of the sample URMs as the datum, 16 buffer zones were set successively outward at step lengths of 100 m, with a total width of 1600 m. USM indices within each buffer zone were calculated by using spatial syntax and road density (RD). The relationship between USM indices and plant diversity of URMs were analyzed. The results shown that: (1) Plant diversity of URMs displayed a positive response to its surrounding USM indices, and the Connection (Con), Integration (I) and RD had significant response to the plant species diversity; The response relationship between the plant species diversity and the USM indices mostly started from 400 m scale, and the significance was mainly at the 600 m scale. (2) The order from high to low of the response relationship in different plant community levels was tree, herb and shrub; the response to Con, I and RD was strong in tree, that of to RD was significant in shrub, and that of to I, Con and Control (Ctrl) was strong in herb. (3) The response strength in different slope position was the foot of mountain > mountainside > mountaintop; There was a weak and unstable correlation between plant diversity in different slope direction and RD in the corresponding direction. This research could provide some scientific reference for mountainous urban spatial planning and plant diversity protection of URMs.

为探索城市残山（URMs）植物多样性对其周边城市空间形态（USM）的响应，采用核密度法选取贵阳市建成区中的9个城市残山作为研究对象。采用坡向和坡位相结合的方式，共设置99个植物多样性调查样地。以样本URM的边缘线为基准，依次向外设置16个缓冲区，步长为100 m，总宽度为1600 m。每个缓冲区内的 USM 指数是通过使用空间句法和道路密度 ( RD）。分析了USM指数与URMs植物多样性之间的关系。结果表明：（1）URMs的植物多样性对其周围的USM指数表现出正响应，Connection（Con）、Integration（I）和RD对植物物种多样性有显着响应；植物物种多样性与USM指数的响应关系大多从400 m尺度开始，显着性主要在600 m尺度。(2)不同植物群落水平响应关系从高到低依次为乔木、草本、灌木；对Con , I和RD的响应在树中很强，对RD的响应在灌木中显着，对I、Con和 Control ( Ctrl ) 的显着性在草本中。(3)不同坡位的响应强度为山脚>山腰>山顶；不同坡向植物多样性与对应方向RD之间存在弱且不稳定的相关性。该研究可为山地城市空间规划和URM植物多样性保护提供一定的科学参考。