The invention discloses a PDC (Polycrystalline Diamond Compact) bit with a transverse jet hydraulic structure and belongs to the technical field of bits for drilling. The PCD bit comprises an integral bit body, blades, chip spaces and water holes, wherein the chip spaces are located between adjacent blades, the left sides of the chip spaces are front end surfaces of the blades, and the right sides of the chip spaces are rear end surfaces of the blades; PDC teeth for cutting rocks are brazed on the front end surfaces of the blades; the water holes comprise conventional water holes and transverse water holes, the conventional water holes are formed in the chip spaces at the front of the PDC teeth, the transverse water holes are formed in the radial end surfaces of the blades, the jet outlet directions of the transverse water holes point to the chip spaces on the opposite side. The PCD bit with the transverse jet hydraulic structure has the advantages that the jet flow of the transverse water holes can enable the bit to achieve a better cleaning effect and the probability of bit balling is reduced; the cleaning and cooling effects of the PDC teeth can be improved and the service life of the bit is maximized; by improving the rock chip removing efficiency, the bit is enabled to obtain higher mechanical drilling speed.