The invention in particular relates to a flat-panel display with an inverted Y-shaped inclined high-grating single-point cathode control structure and a manufacture process thereof. The flat-panel display comprises a sealing vacuum chamber, an anode conduction layer, an anode wiring layer, an anode insulation layer, a fluorescent powder layer prepared on the anode conduction layer, an isolation supporter and a degasifier, wherein the sealing vacuum chamber comprises an anode glass panel, a cathode glass panel and a glass frame; the anode conduction layer, the anode wiring layer, the anode insulation layer and the fluorescent powder layer are arranged on the anode glass panel; and the isolation supporter and the degasifier are arranged between the anode glass panel and the cathode glass panel. The inverted Y-shaped inclined high-grating single-point cathode control structure comprises a cathode glass panel, a barrier and isolation layer, a cathode conducting layer, a cathode wiring layer, a cathode lifting layer, a first cathode transition layer, a second cathode transition layer, a cathode sacrificial layer, a first grating and cathode spacing layer, a first gate electrode layer, a gate electrode wiring layer, a second grating and cathode spacing layer, a second gate electrode layer, a third grating and cathode spacing layer and a carbon nano tube part. The invention has the advantages of low cost, simple manufacture process and stable and reliable manufacture process.