The invention belongs to the technical field of rubber and plastic products, and provides an ultralow-temperature-resistant rubber and plastic product. The product comprises, by mass, 20-25 parts of ethylene propylene diene monomer rubber. 3-5 parts of butyl rubber, 1-1.5 parts of butadiene rubber, 5-7 parts of a foaming agent, 20-30 parts of a flame retardant, 6-8 parts of operating oil, 4-7 parts of a low-temperature plasticizer, 0.3-0.5 part of an activator, 0.1-0.3 part of stearic acid, 3-5 parts of protective wax, 3-5 parts of an accelerant, 0.5-0.8 part of a vulcanizing agent and 0.1-0.2part of pigment. The ethylene propylene diene monomer, the butyl rubber, the butadiene rubber, the foaming agent, the flame retardant, the pigment, the operating oil, the low-temperature plasticizer,the protective wax, the activator and the stearic acid are subjected to banburying, discharging, open milling, compound milling and storage for 22-26 h, the vulcanizing agent and the accelerant are added, and mixing, extrusion molding and vulcanization foaming are conducted to obtain the ultralow-temperature-resistant rubber and plastic product. Through the technical scheme, the problem of poor low-temperature resistance of rubber in the prior art is solved.