A multifunctional tool kit with functions of a portable power source and a light source comprises a tool kit body and a tool kit cover on the tool kit body. A handle is disposed on the tool kit cover. A foldable support arm is disposed in the tool kit body. The lower end of the foldable support art is connected with the inner side of the tool kit body. The upper end of the foldable support arm is connected with a solar panel. A power supply and a power supply output module connected with the power supply are disposed in the tool kit body. A low-voltage charging groove and tool slots for placing tools are formed in the tool kit body. A lamp strip is further disposed on the outer side of the tool kit body. A circuit switch is disposed on the circuit of the lamp strip. An LED tool handle is disposed in the tool kit body. The multifunctional tool kit has the advantages that the black tool kit design and layered arrangement are used, natural energy is utilized, the tool kit gets rid of the dependence on field environments, and the tool kit is energy saving and environmental friendly, convenient and efficient, and high in field practicality.