Considering that the rework of nonconforming product leads to the unfeasible production planning and scheduling in the fixed-position assembly workshop, an integrated optimization method for the production planning and scheduling based on delaying rework is proposed. Firstly, rough-cut production planning based on delaying rework is made. After this plan was delivered and performed, the nonconforming products of every cycle are put into the buffer. Correspondingly, at the beginning of the next cycle, the production plan is adjusted and its corresponding schedule is optimized. Both of them are identified whether to satisfy the requirement of load rate of assembly teams. Alternate iteration of the production plan and schedule is proceeded until the optimization and balance are achieved simultaneously. Finally, the examples are given to illustrate the feasibitily and effectiveness.