Abstract: According to the problems that conveyor feed was not smooth and blocking when feeding long and tough straw such as corn straw and sorghum straw，short，soft and large wrapping straw such as alfalfa and haulm straw using feeding mechanism of side feeding bundling machine，trigeminal conveying feeding mechanism was designed.Solid modeling，assemble virtually and check interference of fork were achieved by using Solidworks software.And motion simulation and analysis of trigeminal conveying feeding mechanism were completed by using ADAMS virtual simulation technology.Motion loci and speed and acceleration of feeding fork top were obtained to verify the accuracy of the theory of approximate data.Problems of long design cycle and low efficiency existing in traditional design were overcome.It provided theoretical basis and practical methods for design of trigeminal conveying feed mechanism.