Sweet potato balls and making process thereof

The invention discloses sweet potato balls and a making process thereof. The sweet potato balls are prepared from, by weight, 50%-70% of sweet potatoes, 25%-30% of cassava starch, 2%-8% of white granulated sugar and the balance water. The making process of the sweet potato balls includes the following steps that 1, fresh sweet potatoes are peeled and washed clean; 2, the clean sweet potatoes are put into a steamer to be steamed to be well done; 3, the well-done sweet potatoes are cooled at a normal temperature; 4, the cooled sweet potatoes are put into a mixing hopper together with part of the cassava starch, the white granulated sugar and the water, even stirring is carried out till the mixture is in a mash state, and thus sweet potato mash is obtained; 5, the sweet potato mash is pressed and extruded with a screw extruder to form long and thin sweet potato mash chips, the rest of the cassava starch is uniformly scattered on the sweet potato mash chips, then the sweet potato mash chips are diced into a round