The update cycle of the maintenance file of organic fertilizer equipment should be determined according to the frequency of use, working conditions and the actual needs of maintenance. Here are some recommended update cycles:

1. Daily maintenance records: Daily maintenance records should be updated every day to record the daily equipment operation, cleaning, lubrication and other basic maintenance activities.

2. Regular inspection records: Regular inspection records are usually updated weekly or monthly, depending on the frequency and complexity of the organic fertilizer production line. These records include checks on equipment performance and safety.

3. Maintenance and fault records: Maintenance and fault records should be updated immediately after each maintenance activity, including maintenance date, fault description, measures taken and other information.

4. Annual maintenance plan: The annual maintenance plan should be developed at the end or beginning of each year, and updated and adjusted according to actual maintenance activities during the year.

5. Equipment overhaul and transformation records: For periodic overhaul and transformation, records should be updated after the end of the service cycle or after the completion of the overhaul and transformation.

6. Equipment performance and condition evaluation: Equipment performance and condition evaluation may need to be updated quarterly or semiannually to monitor long-term performance and aging of equipment.

7. Spare parts and consumables management: The use and inventory records of spare parts and consumables should be updated regularly according to actual consumption to ensure the timely supply of key spare parts.

In summary, the update cycle of organic fertilizer equipment maintenance files should be determined according to the specific situation of the equipment and maintenance needs to ensure the accuracy and timeliness of the file information.