The invention discloses a bucket-shaped sharp corner box, and relates to a production method of a paper container. A square paper is taken to produce a paper edge and paper middle intersecting point forward folding line, an anticlockwise reverse folding line, a short reverse folding line, a paper edge intersecting point forward folding line and a paper corner direction reverse folding line; the square paper is divided into four parts, that is, every paper corner is one part; one paper corner is folded firstly, and is folded and bonded according to the anticlockwise reverse folding line, the paper edge and paper middle intersecting point forward folding line connected with the paper middle direction end point of the anticlockwise reverse folding line, a forward folding line between paper edge intersecting points, the short reverse folding line connected with a straight line of the forward folding line between the paper edge intersecting points and the paper corner direction reverse folding line, and a box bottom edge length forward folding line is correspondingly folded to finish the folding of one paper corner part; the other three paper corners are also folded like this to form a box body; the folding parts of adjacent two paper corners are overlapped; and the paper corners are positioned on the lower layers of the overlapped parts to form the bucket-shaped sharp corner box. The bucket-shaped sharp corner box is peculiar and skilful in design, is tidy and regular in folding lines, is simple in folding method, is easy in operation, is beautiful in shape, and is unusual.