Application of epoxy resin composite material in ultralow-temperature pressure-bearing structural member

The invention discloses an application of an epoxy resin composite material in an ultralow-temperature pressure-bearing structural member, the epoxy resin composite material is subjected to mold pressing curing molding to prepare the ultralow-temperature pressure-bearing structural member, and the application temperature is-196 to-60 DEG C; the epoxy resin composite material comprises the following components in parts by mass: 100 parts of epoxy resin, 30-90 parts of a liquid anhydride curing agent, 0-30 parts of a toughening agent, 0.5-2 parts of an amine accelerator, 100-350 parts of a reinforcing material and 50-250 parts of filler. The fiber reinforced material with the ultra-large length-diameter ratio and the filler are added, entanglement and agglomeration of fibers are avoided through kneading of a kneading machine, the low-temperature toughness and strength of the composite material are greatly improved, and the compression strength of a prepared pressure-bearing structural part at the ultralow tempe