In order to improve the anticorrosion of elelctroless Ni-P-PTFE composite coating, electroless Ni-P-PTFE composite coatings were prepared on 45^#carbon steel specimen in chemical plating solution with addition of rare earth cerium ( Ce) . Surface morphology of the coatings was observed by scanning electron microscope ( SEM) . Effect of cerium concentration on PTFE content of the coatings was investigated. And effect of cerium concentration on corrosion behavior of the composite coatings was evaluated by immersion test with 3 . 5 % NaCl and 3 . 5 % NaOH solutions respectively. The results obtained indicate that proper addition of cerium into the bath increases the PTFE content of the coatings, decreases the corrosion rate, improving the anticorrosive property of the coatings. Corrosion rates of the composite coatings in 3 . 5 % NaCl and 3 . 5 % NaOH are 0 . 402mg / cm²and 0 . 235 mg / cm²in the cerium concentration of 0 . 02 g / L, respectively.