The present invention discloses an immersed tunnel pipe joint fireproof structure comprising a waterproof band assembly and a fireproof assembly which are disposed between two adjacent pipelines of animmersed tunnel. The fireproof assembly is spaced from the waterproof band assembly and positioned at the inner side. The fireproof assembly comprises a protection plate assembly comprising a first fireproof plate, a second fireproof plate, a first moving assembly and a second moving assembly, wherein the first fireproof plate is spaced from the second fireproof plate and positioned at the innerside, one end of the first fireproof plate is connected with one pipeline, the other end of the first fireproof plate is movably connected to the other pipeline via the first moving assembly, one endof the second fireproof plate is connected with the one pipeline, and other end of the second fireproof plate is movably connected to the other pipeline via the second moving assembly; a heat insulation member positioned between the first fireproof plate and the second fireproof plate; and a flexible fireproof band positioned between the first moving assembly and the second moving assembly. According to the technical scheme, fireproof time efficiency and displacement requirements can be simultaneously satisfied by the immersed tunnel pipe joint fireproof structure.