The invention discloses Moringa oleifera sugar-free yoghurt and a making process thereof; the Moringa oleifera sugar-free yoghurt is made from, by weight, 1.8-2.5 g of leaf powder of Moringa oleifera, 80-150 g of xylitol, 1-1.6 g of yoghurt culture, and 1000 mL of milk, by: processing the milk with a colloid mill, adding the xylitol and leaf powder of Moringa oleifera, stirring well, heating, cooling the milk, adding the yoghurt culture, stirring well, filling with a container, fermenting at 38-40 DEG C for 1.5-2.5 h, shaking well, and standing for fermenting for 3-6 h. The Moringa oleifera sugar-free yoghurt and the making process thereof have the advantages that xylitol is used as a sweetener, the leaf powder of Moringa oleifera is added, good yoghurt form is retained during yoghurt fermenting, sugar intake can be limited, the taste of the yoghurt is improved, and the yoghurt has rich nutrition and meets the needs of mass people.