Purpose/Significance The load balancing scheduling method is proposed to shorten the waiting time and balance the load of each machine in additive manufacturing of customized medical devices. Method/Process By analyzing the influencing factors in the time dimension, the mathematical model of the two-objective multi-constraint optimization problem is established. The load balancing operator is introduced and the load balancing scheduling algorithm is used to solve the model. Result/Conclusion The load balancing scheduling method with load balancing operators is superior to other algorithms in terms of task waiting time and load balancing performance, especially for large-scale tasks. This method can effectively shorten task waiting time and realize machine load balancing.