In order to understand the status of early fish resources in the river-lake corridor of Lake Poyang during the early period of fishing ban, daily surveys on juvenile fishes were carried out from 5th April to 21st August 2023 in the corridor. Results showed that a total of 142054 juveniles were collected, and 38 species of juveniles belonging to 7 orders and 9 families were identified. There were 6 dominant species, with Coilia nasus which recovered remarkably after the ban on fishing and followed by the other five Hemiculter bleekeri, Rhinogobius giurinus, Hemiculter leucisculus, Pseudolaubuca sinensis, and Xenocypris argentea. During the survey period, smolts' abundance peaked on 21st July, reaching 11476 ind./100 m³. Spatial analysis showed that larvae abundance in the south bank was significantly higher than those in both north bank and the central sampling site. Redundancy analysis showed that turbidity, flow velocity and water level were the key environmental factors affecting the juvenile fish abundance. Turbidity was significantly and positively correlated with the juvenile fish abundance. According to the migratory habits of their parents, the fish communities were dominated by freshwater sedentary fishes, accounting for 76.32% and 68.29% of the total species number and abundance, respectively. According to the spawning mode of their parents, the fishes were mainly drift-spawning ones, accounting for 47.37% and 48.94% of the total species and abundance, respectively. Our study showed high diversity in fish communities in Hukou, but mainly consisted of small fishes. Meanwhile, we found that the average abundance of juvenile fish was higher on the south bank (1743 ind./100 m³) than that on the north bank (431 ind./100 m³) and in the center of the sampling site (258 ind./100 m³). The results of this survey supplemented basic data of early fish resources in the lake mouth of Lake Poyang after the ban on fishing in the Yangtze River, and provided a scientific basis for the fish diversity protection.