Hydraulic oil cylinder mandrel sleeve

The utility model provides a hydraulic oil cylinder mandrel sleeve, and relates to the field of mandrel sleeves, the hydraulic oil cylinder mandrel sleeve comprises a bearing sleeve and a fixing ring arranged on the bearing sleeve, the two sides of the bearing sleeve are provided with installation clamping blocks, the installation clamping blocks are provided with insertion ports, the insertion ports are provided with fixing bayonets, and the fixing bayonets are arranged on the bearing sleeve. A plurality of supporting columns are fixedly connected to the outer side wall of the lower end of the fixing ring, and through the arrangement of the multiple supporting columns between the fixing ring and the mounting clamping ring, when a bearing sleeve at the bottom receives large external pressure in the using process, the supporting columns can support the bearing sleeve through the hardness of the supporting columns; the bearing sleeve is prevented from being bent due to the fact that the bearing sleeve suffers f