This paper aims to improve the polar environment adaptability of low-temperature clad steel plate. In this paper, the low-temperature clad steel plate was prepared by the method of explosion cladding. The full immersion corrosion, interim immersion corrosion, corrosion wear test, series temperature Charpy impact test, series temperature dynamic tear test and full thickness crack arrest test were taken to value corrosion resistance, wear resistance, low- temperature fracture property and crack arresting property of the low-temperature clad steel plate, the low-temperature fracture property and the polar environment adaptability of low-temperature clad steel plate were analyzed. Under full immersion corrosion condition, the corrosion rate of the base material is 105 times that the compound material; Under interim immersion corrosion condition, the corrosion rate of the base material is 350 times that the compound material, and this shows that the compound material has better corrosion resistance than that of the base material in both conditions. Under simulated seawater condition, the wear amount of the compound material 317L stainless steel is 0.003, the base material FH40 steel is 0.75, and the wear amount of the base material is 250 times that of the compound material. This shows that the compound material has better wear resistance than that of the base material. The correlation between ductile-brittle transition characteristic temperature and crack arrest temperature of 20 groups thick low-temperature steels is investigated, and the limitation of taking the impact energy as a technical index of fracture performance of low- temperature steel in existing codes and standards is pointed out. The correlation equation between crack arrest temperature and ductile-brittle transition characteristic temperature of dynamic tear is established, the suggested value of ductile- brittle transition characteristic temperature under low-temperature service is given, and finally the minimum service temperature of clad steel plate in polar low-temperature environment is determined. In a word, under simulated seawater condition, the corrosion rate and wear amount of the compound material of clad steel plate are much lower than that of the base steel plate. The corrosion and wear problems of low-temperature steel in polar environment can be solved by the design idea of compound material + base material. The properties measured by the Charpy impact test can‘t effectively characterize the actual properties of thick steel plates, and taking the impact performance characterization as a technical index value of fracture performance in existing codes and standards will not guarantee the service safety of low- temperature steel in the polar environment. Ductile-brittle transition characteristic temperature of the center dynamic tear test can effectively characterize the actual service performance of low-temperature steel.