Three types of polythene anti-corrosion layer(3PE coating, heat shrinkable wraparound sleeve and heat shrink sleeve)were studied by observing the changes of cathodic protection current with different cathode polarization potentials in the cathode stripping process and cathodic disbonding resistance performance in different conditions of the three kinds of anti-corrosion layers.Results show that, cathodic disbanding distance of the three types of polythene anticorrosion layer increases with the decline of potential, the increase of temperature and prolongation of time;Polarization current of three polythene anti-corrosion layer appears to be different volatility in a more negative polarization potential during cathodic disbanding process; In a more negative cathodic protection, the cathodic disbonding resistance of 3PE coating is better than others.