Abstract: In this paper , a novel method was introduced to test the fiber number2length distribution of cotton
fibers. The sample fibers were combed into a bundle one end flat and the other end uniform and straight along
the fiber length direction , then , the bundle was cut into fiber particles with specific length by a fiber
amputator , and the particles from different area of the fibers were distributed on a grading board , after that ,
the images of the fiber particles on the board were taken and transferred into a computer by a scanner and other
image analysis equipments. Image analysis arithmetic was used to calculate the number of the particles and
figure out the fiber number at different fiber length area , then , different values such as maximumfiber length ,
mean length based on the number of fibers and standard deviation of fiber number2length distribution were
worked out .