In order to realize automatic flip, automatic feeding of pulp, a new type of pulp feeder structure scheme was put forward. Hydraulic system was adopted to finish upgrading the crib and clamping, flip of the buttress was driven by the motor reducer gear. The 3D design of the feeding machine was done. Using the finite element analysis software ANSYS, mechanics analysis for the feeding machine cage body was completed. Stress weak structure was improved. It provides preliminary basis for the development of full automatic production line for viscose staple.