1. Roots blower maintenance (1) routine maintenance: daily work should pay attention to bearing temperature, sound, vibration, check the oil level, oil temperature, intake and exhaust pressure, ammeter index and so on. (2) monthly inspection: a fan with a V-belt drive should regularly check the V belt tension. (3) Quarterly Inspection: Regularly clean the filter every quarter to change the lubricant. (4) annual inspection: every year should regularly clean the fan gear, bearings, oil seal, gas seal. Check the rotor and the cylinder inside the situation, correct each department gap. 2. Conclusion Roots blower in the continuous use of the process there will be different degrees of wear and tear, fan cavity rotor and rotor, rotor and the gap between the separator is the main reason for the normal operation of the fan, so adjust the fan installation Cavity clearance, lubricating the lubricating parts of the fan regularly to avoid the installation and lubrication due to poor fan appeared normal operation, will be able to properly ensure the normal operation of Roots blower to ensure the normal operation of production.