The invention discloses an inner liner of a vehicle-mounted refrigerator. The inner liner comprises a lower inner liner with an upward opening, wherein the upper-end opening of the lower inner liner is in extending connection with a lower-end opening of an upper inner liner; the lower inner liner is made of aluminum, copper, alloy and the like with good heat conductivity; and the upper inner liner is made of plastic. As the upper inner liner and the lower inner liner are connected and matched to constitute the inner liner of the refrigerator, the detachment and the installation are simple and convenient; the lower inner liner is made of aluminum, copper, alloy and the like with good heat conductivity and used for being connected with a semi-conductor chilling plate for heat-exchange refrigeration; and the upper inner liner is made of plastic, and therefore, is low in price, so that the manufacturing cost is lowered while refrigeration is guaranteed.