The invention discloses a 7D printing system and a printing method thereof. The 7D printing system comprises a raw material unit, a plastic bottom shell forming unit, a component printing unit, a conductive material printing unit and a main machine system, wherein, the raw material unit is used for storing various insulating materials and circuit printing materials, the plastic bottom shell forming unit is connected with the main machine system and used for printing the insulating materials in the raw material unit into shell bodies of electronic products, the component printing unit is connected with the main machine system and used for printing the circuit printing materials in the raw material unit into all the components in the electronic products, the conductive material printing unit is connected with the main machine system and used for electrically connecting the printed components, and the7D printing system has the effects that the cost is low; constituent parts are few, the equipment cost is much less than investment of the prior art, and the leakproofness is good; by means of the 7D printing system, the shell bodies of products are directly printed and packed, fixing is achieved without using traditional screws, and the sealing performance, waterproofness and short-circuit-proof capacity of the products are improved.