Hidden danger inspection is a measure to conduct hidden dangers that may lead to dangerous conditions of the items, unsafe behaviors of people and management defects in daily production and operation by the production and operation units, through the "Safety Inspection Table Method" and "Accident Hazard Reminder Table Method". The purpose is to deepen the investigation and control of hidden dangers for production safety accidents, thoroughly rectify the hidden dangers investigated and dealt with, curb the occurrence of new safety hazards, form a long-term mechanism for the investigation and control of hidden dangers for production safety accidents, and resolutely curb the occurrence of major accidents.