M included side sharp bottom PE coated paper pre-folding mark guide paper bag

The utility model relates to the field of food package and provides an M included side sharp bottom PE coated paper pre-folding mark guide paper bag. An unfolded paper bag plane is a rectangular paper piece, the upper end of the paper piece is provided with a big-end-up trapezoid gap in a centered mode, a trapezoid convex piece protruding out of the paper piece edge and identical to the trapezoid gap in shape is arranged at the position of the lower end of the paper piece corresponding to the gap, the paper piece is provided with four transverse folding mark lines and six longitudinal folding mark lines which are intersected, folding marks of two inverted right-angled isosceles triangle are arranged at the intersected positions of the upper and lower transverse lines and six longitudinal folding mark lines, two of acute angles are respectively intersected with the upper and lower transverse lines and the outer longitudinal lines, the upper and lower transverse lines are intersected with the inner longitudinal