A device for improving the turbulence effect of biogas slurry in a curved methane generation system, which includes: feed pipe, discharge pipe, U-shaped fermentation pipe, the U-shaped fermentation pipe is placed horizontally, and the feed pipe and discharge pipe are vertically connected to the U-shaped fermentation pipe. On both ends of the pipeline, a water pressure room is placed on the upper part of the U-shaped fermentation pipeline. A feed pipe air baffle is set at the connection position between the pipeline and the feed pipe, a discharge pipe air baffle is set at the connection position between the U-shaped fermentation pipeline and the discharge pipe, the discharge pipe air baffle and the feed pipe air baffle There is also at least one air baffle between them, and a fermentation area is formed between the inlet / outlet pipe and the adjacent air baffle or between the adjacent air baffles, and the top of each fermentation area is provided with an independent collector Trachea; the top of each fermentation area is connected to an independent gas collection pipe, and the gas collection pipe is equipped with a valve body; the U-shaped channel fermentation device is adopted, the fermentation route is long, and the biogas slurry is realized by using the control of water pressure difference and one-way valve It flows fully in the system and drives the uniform distribution of bacteria, effectively preventing crusting and high gas production rate.