The invention discloses a water-based negative oxygen ion internal wall paint production process system which comprises a vertical columnar paint dispersing tank. A feed port is formed in one side ofthe top of the paint dispersing tank. A columnar paint dispersing cavity is formed in a tank body of the paint dispersing tank. The process system further comprises a paint guide-out pipe. The liquidinlet end of the paint guide-out pipe is communicated with the bottom of the paint dispersing cavity. An electromagnetic valve and a liquid suction pump are installed on the paint guide-out pipe. Thejet sprayed out of nozzles of all jet pipes passes through a cavity body in a dispersing jet cavity and is then injected into a liquid surface in the dispersing jet cavity, the continuous splashing collision type jet is formed on the liquid surface in the dispersing jet cavity, the splashing type jet can repeatedly collide with an emulsion of the liquid surface in the dispersing jet cavity, and therefore the fine dispersing and emulsifying effect of the emulsion in the dispersing jet cavity is more delicate.