Self-cleaning grinding fluid central supply system

The invention provides a self-cleaning grinding fluid central supply system which comprises a raw material supply unit, a material mixing and stirring unit and a grinding fluid supply unit, and the material mixing and stirring unit comprises a first material mixing and stirring tank, a second material mixing and stirring tank and a third material mixing and stirring tank; the grinding fluid supply unit comprises a first grinding fluid supply pipeline and a second grinding fluid supply pipeline, and the first mixing and stirring tank, the second mixing and stirring tank and the third mixing and stirring tank are respectively in three different procedures of supply, pipe washing and moisturizing and moisturizing and fluid preparation in the same time period; the first mixing and stirring tank, the second mixing and stirring tank or the third mixing and stirring tank is switched to be communicated with the second grinding fluid supply pipeline or switched to be communicated with the first grinding fluid supply p