Hydraulic oil cylinder with multiple stages of sleeves and high protection performance

The utility model discloses a hydraulic oil cylinder with multiple stages of sleeves and high protection performance, which relates to the technical field of hydraulic oil cylinders and comprises a first-stage sleeve, a second-stage sleeve slidably sleeved in the first-stage sleeve and a piston rod slidably sleeved in the second-stage sleeve. And a first-stage buffer component and a second-stage buffer component which are connected with each other are mounted on the outer ring of the second-stage sleeve and the outer ring of the piston rod. The structure is reasonable, when the bottom of the second buffer ring makes contact with the first buffer groove, the bottom of the second buffer ring deforms towards the two sides, and meanwhile the first weakening groove and the second weakening groove are extruded, so that the deformation quantity of the second buffer ring is increased, and the buffer effect of the second buffer ring is improved; and the first-stage buffering component buffers the second fixing ring, s