The invention relates to the field of hydraulic devices, in particular to a hydraulic cylinder retractable sealing device and a hydraulic cylinder. The hydraulic cylinder retractable sealing device comprises an inner sealing sleeve and an outer sealing sleeve; the outer sealing sleeve adopts aluminum foil cloth, and the inner sealing sleeve comprises outer layer heat-insulating cloth and inner layer flame-retarding cloth; the two ends of the inner sealing sleeve and the outer sealing sleeve are both opened, and the inner sealing sleeve is arranged in the outer sealing sleeve; and the two ends of the inner sealing sleeve are connected into two end openings of the outer sealing sleeve correspondingly. The hydraulic cylinder retractable sealing device adopts a matching mode that the aluminum foil cloth, the outer layer heat-insulating cloth and the inner layer flame-retarding cloth are arranged from outside to inside, so that the hydraulic cylinder retractable sealing device has a good heat-insulating property and a good naked-light-resistant property and meanwhile has a good appearance effect.