NOVELTY - The biogas generation system comprises an inlet feeding device, track type fermentation pipeline and marsh gas collecting device, where the inlet feeding device is placed on multiple drain collector. The drain collector is connected with a sewage collection pipe, total feeding pipe and fermentation pipeline. The fermentation pipeline includes a reservoir pipe chamber and bending circling fermentation pipes. The total feeding pipe and the fermentation pipeline are connected with the marsh gas collecting device.    USE - Used as biogas generation system.    ADVANTAGE - The system does not produce agglomeration and residue during the generation of biogas and is eco-friendly.    DETAILED DESCRIPTION - The biogas generation system comprises an inlet feeding device, track type fermentation pipeline and marsh gas collecting device, where the inlet feeding device is placed on multiple drain collectors. The drain collector is connected with a sewage collection pipe, a total feeding pipe and a fermentation pipeline. The fermentation pipeline includes a reservoir pipe chamber and a fermentation pipe. The total feeding pipe and the fermentation pipeline are connected with the marsh gas collecting device. The marsh gas collecting device comprises a gas collecting pipe and a gas storage member. The marsh gas collecting pipe is provided with an air inlet pipeline and the fermentation pipeline. The feeding pipeline is divided by a feeding pipe, a fermentation pipe and a conveying pipe. The feeding pipe is provided with a feeding curve. The feeding curve has a height of 0.2 m. The conveying pipe is provided with a biogas residue fertilizer and a discharging port. The discharging port is provided with a discharging curve. The discharging curve has a lowest point of 0.2 m. The fermentation pipe is connected with a multi-section straight pipe, multi-section connecting pipe and a sealing pipe. A dredging device is connected with a scraping camber. The fermentation pipeline is connected with a horizontal pipe. The marsh gas collecting pipe is an equipped with a discharging valve. The fermenting pipe feeding port is fixed on drain collector at an height of 2 m. The drain collector is fixed with residential toilet, bathroom and kitchen. The collecting pipe is connected with the total feeding pipe. The feeding pipe is connected with a material separation device. The material separation device comprises a filter screen and a slag chamber.