Abstract: Taking Hangzhou, Zhejiang province as an example, this paper conducted an exploratory research on the investigation of small and micro wetland resources at the municipal level, discussed the investigation methods of small and micro wetlands, and preliminarily grasped the resources and distribution characteristics of small and micro wetlands in Hangzhou. By the end of 2020, the area of small and micro wetlands in Hangzhou was 16,175.75 hm², accounting for 0.96% of the city’s land area, equivalent to 13.71% of wetland area of 117,815.81 hm² released by the Second National Wetland Survey in 2013. In wetland classification, the city’s small and micro wetlands can be divided into 7 types, of which the reservoir type was 11,708.27 hm², accounting for 72.38% of the total area. In the patchy structure, as the plaque size increased, the proportion of quantity and area of small and micro wetlands decreased continuously, and the distribution law showed a decreasing power function. In terms of wetland distribution, they were concentrated in Yuhang District, Lin’an District, Fuyang District, Jiande District and Xiaoshan District, accounting for 73.38% of the total area. In the end, this paper combed the threats faced by small and micro wetlands in Hangzhou, and put forward targeted protection strategies, so as to provide a scientific basis for improving the investigation system nd promoting the protection of small and micro wetlands in Hangzhou and other regions.