In order to clarify the performance of marine steel in real service conditions of polar ice seawater with microorganisms at low temperature, herein, the corrosion and wear corrosion behavior of a F-class marine steel FH40 at low temperatures in simulated polar seawater solution, which is a mixture of artificial seawater with Psychrophilic cibarius containing 2216E culture medium was studied via immersion test, electrochemical measurement and reciprocating friction and wear test. The results showed that FH40 steel consisted primarily of ferrite and a small amount of pearlite, with minor common inclusions containing Al, Ti, and Si. The corrosion rate of the steel in the simulated polar seawater was (0.238 ± 0.005) mm/a. Corrosion products composed of γ-FeOOH, α-FeOOH, Fe₂O₃/Fe₃O₄, and a microbial biofilm of Psychrophilic cibarius. These loose and porous corrosion product film, along with localized coverage of polar microorganisms, synergistically induced the formation of pits. The friction coefficient of steel in simulated polar seawater was 0.41 with a specific wear rate of 4.1 × 10^-5 g/(N·m·s) and a wear volume of 0.019 mm³. The mechanism related with the wear-corrosion was identified as a hybrid model involving mechanical removal and corrosion removal. In addition, friction exacerbated localized corrosion and compromised the corrosion protection of the rust layer, while the post continued corrosion of the worn steels helped alleviate pitting corrosion in the wear scar area and reduced the width of the wear scar.