Preparing is an main become involved gathering alfalfa fodder, as wringing and turning alfalfa stems can decay the stem fibers and hasten the drying rate of alfalfa. The feature of alfalfa dried grass is straightforwardly concerned for one adapting effect. The fixed part procedure (FEM) can qantitatively resolve the interplay friendship 'tween alfalfa and adapting rollers, that is of excellent meaning for reconstructing adapting belongings and optimizing preparing wholes. The veracity of material architecture limits straightforwardly influences the imitation results. On account of the limited width and thin stem divider of alfalfa, few of allure material limits are troublesome to measure or have depressed calculation veracity. Established this education, this study projected a plan for measure the restricted item limits of thin-confine plant stems. By transporting branching pliable, cut, turning, and branching condensation tests on alfalfa stems and joining accompanying the essential connection of the material, the range of manufacturing limits for the stems was preliminarily acquired. By transporting a Plackett–Burman experiment, the limits that influence the maximum shearing force of stems were driven, containing Poisson’s percentage in the isotropic plane, branching adaptable modulus, and the gliding rubbing cooperative betwixt the alfalfa stem and gird plate. By administering the steepest ascension experiment and Box–Behnken experiment, the optimum principles of Poisson’s percentage, branching adaptable modulus, and falling disagreement cooperative were acquired expected 0.42, 28.66 MPa, and 0.60, individually. Already, the double-clip experiment, branching condensation experiment, and preparing experiment were used to judge the veracity of the limits. The results displayed that the average relative wrong betwixt the maximum cut and the calculated worth was 0.88%, and the average relative mistake middle from two points the maximum branching contact force and the calculated worth was 2.13%. In the preparing experiment, the load curve revealed the unchanging flow as the calculated curve, and the imitation results take care of show the stress process and deficiency manner of alfalfa stems. The forming and measurement system can efficiently call the stress and disappointment of alfalfa all the while adapting.