In cold chain logistics, cardboard packaging faces three major challenges: low-temperature embrittlement, condensation corrosion, and immersion in melting ice water. The core value of waxes used in cold chain cardboard packaging lies in achieving structural integrity and protective functions of cardboard in extreme cold chain environments at extremely low cost. Waxes improve the cardboard's moisture resistance, stain resistance, and sealing performance, while enhancing its strength and weather resistance. Wax coating technology has become an important alternative to plastic crates in cold chain logistics. It is mainly used for long-term cold chain transportation of seafood, frozen meat, and other goods, especially in ocean shipping.