Abstract: In order to improve the operation efficiency of mine dust removal system，prolong the ser‐ vice life of equipment and reduce the risk of environmental protection，aiming at the problems of lack of systematic system，frequent equipment failure and insufficient stability of emission compliance in the opera‐ tion and maintenance of mine dust removal system，the core operation and maintenance objectives of emis‐ sion compliance，high equipment intact rate and low failure rate are defined by combing the equipment con‐ figuration，design objectives and operation requirements of the system.An integrated operation and mainte‐ nance system is constructed，and a multi-level maintenance plan and emergency response process for com‐ mon faults are formulated. Taking the crushing and screening workshop of a large open-pit iron mine as a practical case，the practice of special management of key equipment，information solidification of inspec‐ tion system，personnel training and emergency drills are carried out.The practice results show that the emis‐ sion concentration of particulate matter in the exhaust cylinder of the workshop is reduced from 8.5 mg/m3 to 5.1 mg/m3 ，the equipment integrity rate is increased to 96.5%，and the number of fault shutdowns is re‐ duced by 44%，forming a systematic operation and maintenance method suitable for the mine dust removal system.The research shows that the construction and implementation of the integrated operation and mainte‐ nance system can effectively ensure the stable and efficient operation of the mine dust removal system，which can provide scientific theoretical support and replicable practical solutions for mining enterprises to improve the operation and maintenance management level of the dust removal system and avoid environmen‐ tal risks.

Key words: mine dust removal, operation and maintenance, environmental protection