The design of hydraulic cylinder receiving and feeding mechanism in automatic production line is introduced, including dynamic modeling, analysis and design calculation of hydraulic system. The flowchart of the FORTRAN software calculation program is given, and the equivalent mass, inertial drag coefficient, efficiency and speed ratio of the transmission mechanism, and the working thrust of the cylinder are calculated. The displacement and velocity changes of the receiving and feeding components are given. The overall design of the mechanical system and hydraulic system of the hydraulic cylinder receiving and feeding mechanism is proposed, and the program analysis results are basically consistent with the test results. The designed hydraulic cylinder type feeding mechanism performs accurate action and smooth movement.