Microplastics investigation was carried out on water samples from three typical wastewater treatmenplants in Zhenjiang City in 2021, and the water samples were detected and analyzed by electron microscopy and Raman spectroscopy. The results showed that a total of 14 microplastics were detected in the samples, of which polyethylene (PE) accounted for about 40%, polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), etc. accounted for 5%~40%, and nylon (PA), polycarbonate (PC), polyformaldehyde (POM), polymethyl methacrylate (PMMA) and other plastics accounted for a relatively low percentage; the abundance of microplastics in the influent water of plants A, B and C were 2226, 2263, 1950 n/L, and the removal rate of microplastics was 92.1%, 82.5%, 91.3% respectively after treatment at all levels in the wastewater plant; microplastics were mainly fibrous, accounting for about 80%, with granules and irregular shapes second; the color of microplastics was mostly colored and transparent, with no exact rule.