The invention relates to a production line device for large-scale and environment-friendly finless eel culture. The production line device comprises an annular base frame, an annular rotating disc rotationally connected to the base frame, a rotation driving device used for driving the rotating disc to rotate around the center of the base frame, a PLC control panel, multiple finless eel culture net cages, a feeding operation platform, a culture water recovering pond, a discharging and collecting pond, a water injection device, a net cage washing pond, a culture water purifying pond and a water injecting and taking pond. The multiple finless eel culture net cages are uniformly hung at the outer side of the rotating disc in the circumferential direction, the feeding operation platform, the culture water recovering pond, the discharging and collecting pond, the water injection device and the net cage washing pond are sequentially distributed on the periphery of the rotating disc in the clockwise direction, and the feeding operation platform, the culture water recovering pond, the discharging and collecting pond and the net cage washing pond are correspondingly located below the finless eel culture net cages. By means of the production line device, large-scale culture can be conduct on the ground conveniently, culture water can be recycled, culture management and fishing are convenient, and efficiency is high.