The present invention discloses a dual-vortex negative pressure internal combustion engine, which comprises a pressure stabilization fuel tank, a main shaft rod, a shaft rod sleeve, a forward cylinder, a combustion chamber, an internal combustion engine housing, a reverse cylinder and an inertia flywheel, wherein the main shaft rod penetrates through the internal combustion engine housing, the forward cylinder contained inside the internal combustion engine housing, the combustion chamber contained inside the internal combustion engine housing and the reverse cylinder contained inside the internal combustion engine housing, the forward cylinder is connected with one side of the combustion chamber sequentially through a forward cylinder bottom portion round disk control sheet, a round disk control sheet and a combustion chamber front end round disk control sheet, the other side of the combustion chamber is connected with the reverse cylinder sequentially through a combustion chamber rear end round disk control sheet, a round disk control sheet and a reverse cylinder bottom portion round disk control sheet, the pressure stabilization fuel tank is arranged on one end of the main shaft rod and is connected with the forward cylinder through an oil inlet pipeline, a fuel tank internal pressure stabilization and adjustment foam is arranged in the pressure stabilization fuel tank, and the inertia flywheel is arranged on the other end of the main shaft rod. The dual-vortex negative pressure internal combustion engine of the present invention has characteristics of energy source saving, high thermal efficiency, high capacity, high power, long service life, safety, environmental protection, easy production, easy maintenance, and multi-purpose.