Abstract: As an important part of the production of mining enterprises, the working conditions of en⁃ gineering equipment are directly related to the normal production and operation of enterprises. In order to improve the management level of engineering equipment, Sijiaying Iron Mine adopts a series of measures such as technical transformation, invention and innovation management ideas for the hydraulic system of en⁃ gineering equipment, improving the radiator of the hydraulic system of engineering equipment and installing pressure relief oil pipe through practice.Then the service life of hydraulic components of engineering equip⁃ ment is prolonged, the recovery rate of hydraulic oil during maintenance of hydraulic system of engineering equipment is improved, the use cost is reduced, and the normal operation and safe maintenance of equip⁃ ment are realized.

Key words: engineering equipment, hydraulic system, technological transformation