The invention provides an on-site high corrosion resistance treatment method for a stainless steel pipeline and equipment. The on-site high corrosion resistance treatment method is used for treating stainless steel surfaces. The method comprises the steps: fixing a passivating liquid carrier of a passivating liquid containing a certain amount of additives on a stainless steel surface by using a passivating liquid carrier fixing part by taking to-be-treated stainless steel as an anode; forming two conducted electrode systems by taking the passivating liquid carrier fixing part as a cathode; and meanwhile, carrying out electrochemical treatment by controlling current density, voltage, time and temperature to realize the optimization or reconstruction of a passivating film on the stainless steel surface, establish a high-stability passivating film and remarkably improve the corrosion resistance of stainless steel. The invention provides a surface treatment technology which is capable of realizing large-scale industrial application and greatly improving the corrosion resistance of the stainless steel, low in cost and remarkable in effect and can be widely applied to various fields of industry.