The invention relates to an epoxy resin casting adjustment fixture for a glass fiber reinforced (GRE) pipe, and belongs to the technical field of ship repairing and making equipment. The epoxy resin casting adjustment fixture comprises an upper hoop (1), a lower hoop (2), a bin penetration piece (5) and the GRE pipe (8), wherein the upper hoop (1) and the lower hoop (2) are clamped on the outer side surface of the bin penetration piece (5) through bolts; the GRE pipe (8) is inserted into the bin penetration piece (5); two fixed plates (3) which are bilaterally symmetric are arranged on each of the upper hoop (1) and the lower hoop (2); the two fixed plates (3) on the upper hoop (1) are vertically symmetric with the two fixed plates (3) on the lower hoop (2); an adjustment jackscrew (4) is arranged at the end part of each fixed plate (3); and the end parts of the adjustment jackscrews (4) are contacted with the outer side surface of the GRE pipe (8). According to the epoxy resin casting adjustment fixture for the GRE pipe, the concentricity of the bin penetration piece and the GRE pipe can be effectively guaranteed, and an O-shaped ring is arranged conveniently and effectively.