Striking exterior hot cathode-dispersive X-Captain of the present invention, a four-sided box is sealed and the vacuum inside the high vacuum (3); Each electron-emitting unit (1) are independent from each other and arranged in a linear array a plurality of the electron emitting unit mounted to the side wall of the vacuum boxes (3) (1); A vacuum box (3) an anode to form an angle included angle of the scheduled and the mounting surface of the electron emission unit (1) from the array line and parallel to the width direction of the electron emission unit (1) in the mounting and the longitudinal direction in the middle of the interior (2) .; High-voltage power source 702, the focusing power supply 704, one, but provided with a power and control system 7 provided with a discharge control device 703 and control system 701, the electron emission unit (1), heating the filament (101 ); The cathode being connected to the heating filament 101 (102); Insulating support surrounding the anode 102 and the filament 101, 103; Focusing electrode 104 arranged at the upper end of the insulating support (103) to be positioned on top of the cathode (102); Emissions control devices, including, and the filament leads 106 through an insulating support (103); are arranged in the upper portion of the focusing electrode 104, the box connection fixing member wall and sealed connection (105) of the vacuum box (3) It is connected to the 703.