Novel hydraulic jack convenient to maintain

The utility model provides a novel hydraulic jack convenient to maintain, relate to jacking equipment technical field, the main technical problem who solves current inconvenient maintenance of hydraulic jack and maintenance, including big jar and little jar, inside big plunger and the little plunger of being provided with respectively of big jar and little jar, be fixed with a holding blocks on the little jar outer wall, holding blocks is connected with the connecting rod, the connecting rod is connected with and keeps the pole, keep the pole to connect little plunger, keep the pole to be fixed with a control rod, big jar and little cylinder bottom portion all are fixed with same install bin, the inside oil tank that is provided with of install bin, little cylinder bottom portion is through first transfer line with the switch -on of big cylinder bottom portion and through second transfer line and oil tank switch -on, the transfer line all has one section to expose at the install bin outsidely and be provided