The corrosion damage of pile foundation is one important factor affecting the safety of structures under the humid and hot ocean environment，and it is the bottleneck of increasing the service life of piled wharves. Based on the simulation system of indoor marine humid and thermal environment and Faraday’s law of electromagnetic induction，we apply the method of external DC power supply to carry out the artificialy accelerated corrosion behavior，study the corrosion characteristics of CFRP-concrete filled steel tube pile foundation based on the law of more serious corrosion and higher potential value by using the theory of semi-battery electric potential. The results show that the more severe the corrosion is，the higher the potential value is. Two layers of CFRP are more effective than one layer of CFRP.