Objective To study the stability of lumbar spine after transforaminal approach intervertebral fusion (TLIF) combined with a new articular screw plate system APFS. Methods Based on the validated finite element model L3-S1 complete segment, TLIF surgery was simulated to establish a bilateral pedicle screw TLIF model (model B), a right unilateral pedicle screw TLIF model (model C), APFS combined with right pedicle screw fixation TLIF model (model D). Observe the activity of the lumbar spine model and Von Mises stress distribution of pedicle screws, APFS and interbody fusion cages under different working conditions. Results The overall activities of model B, model C, and model D under different working conditions were comparable, which were all smaller than those of the physiological state model. Compared with models B and C, the maximum compressive stress of the right pedicle screw and the interbody fusion cage in model D is the smallest or between models B and C under different working conditions. Model D had the highest peak stress of APFS and right pedicle screw under anterior flexion. Conclusion APFS combined with contralateral pedicle screw fixation can be used as a new fixation method for TLIF surgery of lumbar spine.