Objective To investigate the effect of medical integrated rapid rehabilitation model on perioperative functional rehabilitation in patients with lumbar posterior internal fixation.Methods From January 2021 to June 2021,60 patients with lumbar posterior fixation were collected in January 2021, randomly divided into control group and intervention group with conventional perioperative rehabilitation, and the intervention group adopted medical integrated rapid rehabilitation model. Pain was assessed using visual analogue scale (VAS).The lumbar function and mental health of the patients were evaluated before and after surgery using the Oswestry Disfunction Index questionnaire (ODI), the Japanese Orthopaedic Association Assessment Treatment Sub-Number Scale (JOA) and the Hospital Anxiety and Depression Scale (one week after HADS).Results There were no statistical differences between preoperative JOA scores, ODI scores, and anxiety and depression scores (P>0.05); the intervention group had higher JOA scores and ODI scores than the control group, and the anxiety and depression scores were significantly lower than the control group (P<0.05).Conclusion The integrated rapid rehabilitation model can help patients with lumbar posterior fixation to accelerate the recovery of lumbar function, relieve anxiety and depression, reduce hospital stay, reduce economic burden, and realize early recovery.