The vehicle-mounted storage box comprises a box body, a first drawer, a second drawer and a third drawer, the box body is used for being installed in a vehicle body of a vehicle, the first drawer is movably arranged in the box body in a penetrating mode in the first direction, and the second drawer is movably arranged in the first drawer in a penetrating mode in the first direction; the third drawer movably penetrates through the second drawer in the first direction, the first direction is perpendicular to the vertical direction, a cleaning device mounting part is arranged on the first drawer, a chopping board mounting part is arranged on the second drawer, a stove mounting part is arranged on the third drawer, and the vehicle-mounted storage box has a storage state and an unfolding state; the first drawer, the second drawer and the third drawer are all contained in the box body, in the unfolded state, the part, provided with the cleaning device mounting part, of the first drawer extends out of the box body, the part, provided with the chopping board mounting part, of the second drawer extends out of the first drawer, and the part, provided with the stove mounting part, of the third drawer extends out of the second drawer.