Device for plating wide base material through point source evaporation

The utility model relates to a device for plating a wide base material through point source evaporation. The device comprises a diffuser, a crucible and a material supplementing mechanism, a rectangular steam diffusion cavity is formed in the diffusion body and located below the base material. The opening end of the crucible penetrates through the bottom surface of the diffuser and is communicated with the steam diffusion cavity; the outlet end of the material supplementing mechanism inclines downwards and penetrates through the side face of the diffuser to extend into the steam diffusion cavity. The inner side wall of the diffusion body is connected with a steam distributor in the horizontal direction, the steam distributor divides the steam diffusion cavity, and steam distribution holes distributed in the width direction of the base material are formed in the steam distributor; an anti-condensation sleeve and a heater are sequentially arranged on the inner wall surface of the diffuser from inside to outside