X-ray tube and CT equipment

The embodiment of the invention provides an X-ray tube and CT equipment, the X-ray tube comprises a tube shell, a cathode, an anode and a first electric field structure, the cathode comprises an emitter, and the emitter is used for generating and emitting hot electrons; the anode is provided with an anode target and is used for receiving the hot electrons emitted by the emitter and generating X-rays; the surface, used for emitting hot electrons, of the emitter is a convex cambered surface protruding towards the anode target. According to the X-ray tube provided by the embodiment of the invention, on one hand, the emission distance of the hot electrons towards the anode target can be shortened, on the other hand, the emitter can emit the hot electrons towards the anode target from multiple directions in a divergent mode, and the probability that the hot electrons interfere with one another or converge in advance in the emission process to influence the focal spot area is reduced; the difference of movement tra