The invention discloses a safety lithium battery case. The safety lithium battery case comprises a metal cap, a battery cell, an inner shell and an outer shell, wherein the interior of the outer shellis fixedly provided with the inner shell; the interior of the inner shell is fixedly provided with the battery cell; the metal cap is fixedly arranged at the top of the inner shell; the bottom of themetal cap is positioned inside the inner shell and is fixedly provided with a plastic plate; a blocked layer is fixedly arranged at the top of the plastic plate; the blocked layer is an aluminum-plastic composite film layer, an aluminum foil layer is arranged in the middle of the aluminum-plastic composite film layer, and plastic film layers are arranged on two sides of the aluminum-plastic composite film layer; a cavity is fixedly arranged between the blocked layer and the metal cap; the bottom of the battery cell is fixedly connected with a lithium battery base plate through a wire; a heatconducting silica gel layer is fixedly arranged on the outer wall of the inner shell. According to the safety lithium battery case, a great deal of heat generated by a lithium battery when the lithiumbattery is used for a long time can be quickly conducted into external air by adopting the double shells and setting the heat conducting silica gel and wing-form radiating fins inside the two shells,so that an explosion hazard is avoided, and the service life of the lithium battery is prolonged.