Corrosion-resistant oil cylinder

The utility model relates to the technical field of hydraulic pressure, in particular to a corrosion-resistant oil cylinder. According to the technical scheme, a rear cylinder cover is fixedly installed at one end of the cylinder body, an oil inlet is fixedly formed in the top of the rear cylinder cover, the filtering mechanism is installed on the top of the oil inlet in a threaded mode, the filtering mechanism comprises a filter shell, an installation base is installed on one side of the filter shell in a threaded mode, and a filtering element is installed on one side of the installation base in a threaded mode. Impurities in hydraulic oil can be intercepted through the filter element, the effect of filtering the hydraulic oil is achieved, the problem that fine particles generated in the hydraulic oil rub the piston rod in the cylinder body due to the fact that the hydraulic oil is used for a long time or influenced by high temperature or external factors is solved, the safety of the piston rod in the using