Abstract: As an important aspect of current construction machinery, electrical system has several functions such as mechanical power and control. Once the electrical system of construction machinery is abnormal, it will inevitably affect the entire construction machinery and even cause safety accidents such as fire or electric shock, especially When the product is mixed with the aqueous solution, it is more harmful. Therefore, in order to effectively improve the production safety of enterprises and ensure the personal safety of maintenance personnel, it is necessary to strengthen the management of electrical maintenance of construction machinery.