The invention relates to a production method for sweet potato vermicelli. The production process for sweet potato vermicelli comprises the processes of slurrying, forming, peel cooking, ageing, shredding and drying, wherein the slurrying process comprises the following steps: 1) preparing a cooked paste, namely, placing 2-3% of the total of starch in a basin, adding running water or warm water and uniformly stirring, then adding boiling water occupying 2-3% of the total of starch, rapidly stirring to a thick paste, and naturally cooling to 40-50 DEG C; 2) slurrying, namely, pouring the prepared and cooled cooked paste in a mixing-stirring bucket, adding water and uniformly stirring, then continuously adding the remainder starch in the mixing-stirring bucket, and adding water and uniformly stirring simultaneously; and 3) vacuumizing, namely, pumping the paste prepared in the step 2) in a slurry storage tank by a vacuum pump, vacuumizing, then opening a discharge valve of the slurry storage tank, and discharging to a forming mechanism. According to the production method for sweet potato vermicelli, which is disclosed by the invention, the produced vermicelli is good in impression, boilproof and not liable to break through the vacuumizing treatment in the slurrying process; moreover, other auxiliary materials such as alums and edible gum are not used in the production process, thus guaranteeing the safety and sanitation of the vermicelli.