Abstract: In order to solve the problems of lack of installation reference，insufficient positioning ac⁃ curacy，backward detection methods，poor process standardization，long installation cycle，high rework rate and insufficient operation stability in the traditional installation process of high-efficiency thickener in Yuanjiacun Iron Mine，the precise installation technology of high-efficiency thickener drive head and cen⁃ tral pillar is studied to adapt to the complex topographic and geological conditions，harsh climatic environ⁃ ment and high reliability beneficiation process operation requirements of the mine.Based on the technical core of benchmark unification，detection precision，adjustment standardization and process closed-loop， the whole process precise installation system of theodolite rapid positioning，two-way verticality calibration of central pillar，positioning and installation of underflow cone，four-way horizontality regulation of driving head，coaxiality detection of driving head and central pillar vertical method，fine adjustment of verticality and clearance of driving cage is constructed. The system eliminates the superposition effect of component processing error and field installation error，and realizes the high-precision，high-efficiency and high-sta⁃ bility installation of core bearing and transmission components of high-efficiency thickener.The engineer⁃ ing application results show that the technology can control the verticality deviation of the central pillar within 1 mm，the horizontality of the drive head installation within ± 1 mm，the coaxiality between the drive head and the central pillar within 2 mm，and the gap between the drive cage slider and the central pillar within 5 mm. The total installation period of single equipment is reduced from 324 h to 108 h，the construction efficiency is greatly improved，the resource consumption is significantly reduced，and the comprehensive benefit of the project is obviously optimized.After the equipment is put into use，the opera⁃ tion is stable，the mud scraping is smooth，and the concentration and separation index is stable. It can pro⁃ vide key equipment technical support for the continuous and stable operation of the ore dressing system and the efficient release of production capacity in Yuanjiacun Iron Mine. The precise installation process fills the gap in the standardized and precise installation technology of high-efficiency thickeners in large metallurgical mines in China，and has the value of popularization and application.

Key words: high-efficiency thickener, drive head, central pillar, precise installation, verticality, horizontality, coaxiality