Hydraulic oil cylinder with grounding protection function

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a grounding protection function, which comprises a cylinder bottom and a cylinder barrel, the upper end of the cylinder barrel is fixedly connected with a guide sleeve through a bolt, a piston rod bushing is slidably connected in the guide sleeve, and a piston rod is fixedly connected in the piston rod bushing. A connecting rod is fixedly connected to the middle of the lower end of the piston rod, a piston is arranged on the outer side of the connecting rod, a fastening nut is fixedly connected to the outer side of the lower end of the connecting rod through threads, a connecting sleeve is arranged on the lower side of the fastening nut, a buffer block is fixedly connected to the lower end of the connecting sleeve, and a buffer spring is fixedly connected to the middle of the lower end of the buffer block. According to the hydraulic cylinder, through the arrangement of the connecting sle