The repair of the construction desk machine is an important part of the desk instrument management, and the high efficiency and safe desk equipment cannot be done without the repair of the repairman, and it is the guarantee of the normal operation of the equipment to discover the timely and accurate equipment trouble. In order to reduce maintenance costs and to increase cost effectiveness, maintenance is not only to replace existing desk parts, but also to determine the failure of the desk machine accurately by analyzing the expertise of maintenance staff, and by performing analysis and diagnosis Achieve effective level performance. The construction industry of water and electricity is basically open-air work, and the strength of the work is high, especially in the construction project such as the excavation and the embankment reclamation, the project section uses two groups of work, and the construction desk instrument works the axis. Also, the condition of the construction site is poor, and there is no repair tool, and the strength of the repairman is weak, and the equipment of the diagnosis is not advanced, and it cannot diagnose exactly when the equipment breaks down, and the cycle of the repair is long and expensive. It is against the purpose of cost reduction effect of equipment repair. In order to repair the repair of the construction work, the construction and maintenance of the equipment before and after use are taken up, and the construction is concerned with the tension and the equipment replacement use stage, the person concerned with the organization maintenance, inspection of the stopping equipment, the hydraulic system of the equipment, the circuit system, the control system, chassis, etc The appearance etc.Also change the repair in the timely inspection and the damage of the serious and serious parts. The equipment must be damaged and restored to its members, and this facility can work well, and the serious impact of the construction period is important because of the importance of repair cycle during production It is the completion of this work.