In order to reveal the structure of weed community in the “rice-crayfish” integrated farming fields and the current status of farmers’ weed control measures in Jiangsu, we conducted field surveys and interviews with farmers in 12 integrated rice-shrimp farming bases in 7 places, including Guannan, Yandu, Xuyi, Gaoyou, Guangling, Liyang, and Changshu. The results showed that total 25 weed species were found in 120 rice-shrimp farming fields, and the dominance of gramineous weeds and Leptochloa chinensis in rice-shrimp rotation fields was significantly higher than that of rice-shrimp symbiosis fields. Principal weed species in surveyed rice-shrimp rotation fields included Echinochloa spp., weedy rice, Leptochloa chinensis, Leersia hexandra, Cyperus difformis, Ammannia spp. and Monochoria vaginalis; principal weed species in surveyed rice-shrimp symbiosis fields included Echinochloa spp., weedy rice, Leptochloa chinensis and Cyperus difformis. Except of organic cultivation mode, the weed management strategies in rice-shrimp rotation fields were “pre-emergence chemical control + post-emergence chemical control + manual removal” with a total cost of 1 863.75 Yuan/hm² on average. The weed management strategies in rice-shrimp symbiosis fields were “water control + shrimp control + manual removal” with a total cost of 907.50 Yuan/hm² on average, a part of farmers applied pre-emergence herbicides such as bensulfuron-methyl and pretilachlor.