A press-on cosmetic container comprising: a main tube having an inner surface; an upper open end; multiple positioning protrusions separately formed on and arranged around the inner surface of the main tube, and each positioning protrusion having an upper end; two beveled edges formed on the upper end of the positioning protrusion and slanting in the same direction; and a longitudinal edge having two ends respectively connected to the beveled edges of the positioning protrusion; multiple sliding slots, and each sliding slot extending longitudinally and defined between two of the positioning protrusions that are adjacent to each other; and a limiting protrusion formed around the inner surface of the main tube and disposed between the upper open end of the main tube and the positioning protrusions; an inner tube mounted in the main tube and having an upper end; a lower end; an outer surface; a flange formed around the outer surface of the inner tube and disposed between the positioning protrusions and the limiting protrusion of the main tube; and multiple ribs separately formed on and arranged around the outer surface of the inner tube and disposed between the flange and the lower end of the inner tube, and each rib extending longitudinally; a spring mounted around the inner tube and disposed between the upper end of the inner tube and the flange; and wherein the ribs are selectively revolved such that each rib is positioned alternately through the sliding slots of the main tube and abutting the longitudinal edges and the beveled edges of the positioning protrusions of the main tube; and characterised in comprising: an actuator being tubular, mounted around the lower end of the inner tube, slidably disposed between the inner tube and the main tube, and having an outer surface; an upper peripheral edge; and multiple guiding protrusions separately formed on and arranged around the outer surface of the actuator, and respectively mounted slidably in the sliding slots of the main tube; and when the ribs of the inner tube are respectively mounted through the sliding slots of the main tube, the spring pushes the inner tube, so that the ribs of the inner tube abut the upper peripheral edge of the actuator. a main tube having an inner surface; an upper open end; multiple positioning protrusions separately formed on and arranged around the inner surface of the main tube, and each positioning protrusion having an upper end; two beveled edges formed on the upper end of the positioning protrusion and slanting in the same direction; and a longitudinal edge having two ends respectively connected to the beveled edges of the positioning protrusion; multiple sliding slots, and each sliding slot extending longitudinally and defined between two of the positioning protrusions that are adjacent to each other; and a limiting protrusion formed around the inner surface of the main tube and disposed between the upper open end of the main tube and the positioning protrusions; an inner tube mounted in the main tube and having an upper end; a lower end; an outer surface; a flange formed around the outer surface of the inner tube and disposed between the positioning protrusions and the limiting protrusion of the main tube; and multiple ribs separately formed on and arranged around the outer surface of the inner tube and disposed between the flange and the lower end of the inner tube, and each rib extending longitudinally; a spring mounted around the inner tube and disposed between the upper end of the inner tube and the flange; and wherein the ribs are selectively revolved such that each rib is positioned alternately through the sliding slots of the main tube and abutting the longitudinal edges and the beveled edges of the positioning protrusions of the main tube; and characterised in comprising: an actuator being tubular, mounted around the lower end of the inner tube, slidably disposed between the inner tube and the main tube, and having an outer surface; an upper peripheral edge; and multiple guiding protrusions separately formed on and arranged around the outer surface of the actuator, and respectively mounted slidably in the sliding slots of the main tube; and when the ribs of the inner tube are respectively mounted through the sliding slots of the main tube, the spring pushes the inner tube, so that the ribs of the inner tube abut the upper peripheral edge of the actuator. an actuator being tubular, mounted around the lower end of the inner tube, slidably disposed between the inner tube and the main tube, and having an outer surface; an upper peripheral edge; and multiple guiding protrusions separately formed on and arranged around the outer surface of the actuator, and respectively mounted slidably in the sliding slots of the main tube; and when the ribs of the inner tube are respectively mounted through the sliding slots of the main tube, the spring pushes the inner tube, so that the ribs of the inner tube abut the upper peripheral edge of the actuator.