Objective To address the common problems existing in current Camellia oleifera fruit shelling equipment, such as easy damage to seeds, poor integrity of shells, and unsatisfactory processing effect of fresh fruits.Methods A disc grading and rubbing type Camellia oleifera fruit production line is designed by integrating a feeding machine, a disc grader and three rubbing shelling machines. Taking the feeding speed, classification accuracy rate and classification radius error as indicators, the discrete element simulation analysis is conducted on the feeding machine and the disc grader. With the shell-breaking rate and seed-breaking rate as indicators, a joint simulation of the rubbing shelling machine is conducted using discrete element and RecurDyn software. The simulation results are compared and analyzed with the prototype test results.Results When the conveyor belt speed of the feeding machine is less than 0.14 m/s, the feeding amount of the disc grader is less than 40 s^-1, the rubbing gap of the rubbing shelling machine is less than 3 mm, and the rubbing speed is 35 rad/min, the comprehensive shell-breaking efficiency is the best, with an average shell-breaking rate >97% and seed-breaking rate <3%.Conclusion The Camellia oleifera fruit production line machine has a high shelling rate and a low damage rate.