The invention discloses a folding method for a paper goblet, relating to a manufacturing method of a paper container. The folding method for the paper goblet includes the steps of taking a piece of rectangular paper, making N folding lines longitudinally, and dividing the paper into N+1 congruent longitudinal rectangles; making an upper transverse backward-folding line and a lower transverse backward-folding line, namely the upper transverse line and the lower transverse line, wherein the distance from the upper transverse line to the lower transverse line is equal to that from the lower transverse line to the lower paper edge, and the distance from the upper transverse line to the upper paper edge is not smaller than one-third transverse length of the rectangular paper; folding the part under the lower transverse line; making diagonal forward-folding lines in the same direction at the N+1 congruent longitudinal rectangles above the upper transverse line; conducting backward-folding along the longitudinal folding line, inserting the left end and the right end, and overlapping the longitudinal rectangles at the two ends to form an N-sided drum shape; and backwards folding the part above the upper transverse line along the longitudinal backward-folding line and then conducting forward-folding along the diagonal forward-folding lines, thereby forming the paper goblet. The paper goblet has a high holder with unique appearance, the size of the goblet and the height of the holder can be designed at will, and the paper goblet is clean and neat in shape, stable and firm, attractive and practical, simple to manufacture, and low in cost.