Gas supply pipeline for dual-fuel engine

The invention relates to a gas supply pipeline for a dual-fuel engine. The gas supply pipeline for the dual-fuel engine comprises an inner pipe and an outer pipe; the inner pipe is arranged inside the outer pipe; a gap chamber is formed between the inner pipe and the outer pipe. The gas supply pipeline for the dual-fuel engine is characterized by also comprising a flexible support; the flexible support is formed by a supporting plate and an U-shaped bolt; the supporting plate is connected to the inner wall of the outer pipe; the U-shaped bolt is arranged on the supporting plate; the inner pipe is arranged inside the U-shaped bolt. The gas supply pipeline for the dual-fuel engine has the advantages of preventing gas leaking, enabling detection and maintenance to be convenient and being simple in structure and good in effect.