The invention discloses a sealing structure of a turbo-charged direct injection engine exhaust system. The sealing structure comprises a cylinder head flange, sealing gaskets and an exhaust manifold flange. The cylinder head flange is provided with a plurality of exhaust outlets, the sealing gaskets are provided via holes correspondingly, and the exhaust manifold flange is provided with air duct openings as many as the exhaust outlets. Sealing grooves are formed in the edges, corresponding to the exhaust outlets, of the cylinder head flange, and the number of the sealing gaskets is equal to the number of the exhaust outlets. The sealing gaskets are matched with the end faces of the sealing grooves in shape. Exhaust pipes are arranged on the edges, corresponding to the air duct openings, of the exhaust manifold flange, the height of each exhaust pipe is equal to the depth of the corresponding sealing groove, and an inner hole of each exhaust pipe corresponds to the corresponding air duct opening. The sealing gaskets are mounted in the sealing grooves, the exhaust pipes stretch into the sealing grooves, press the sealing gaskets and are in clearance fit with the sealing grooves, the exhaust outlets, the via holes, the inner holes and the air duct openings communicate with one another correspondingly, and the cylinder head flange and the exhaust manifold flange are connected through bolts and nuts. By means of the sealing structure, the bolts can be prevented from being broken, and the sealing gaskets are protected against seal failures.