Industrial accident treatment duration: ① mild injuries (sprains, strains): 1–3 months, ② moderate (multiple injuries, herniated disc): 3–6 months, ③ severe (with surgery, fracture): 6 months to 1 year, ④ chronic sequelae management: extended periods. Industrial insurance covers reasonable duration based on medical necessity. Initial approval typically 3–6 months with extensions possible. Continue treatment until full functional recovery enabling return to work.