The invention relates to a drop-type 10kV line arrester including a composite insulator and an arrester. An upper static contact is installed on the upper part of the composite insulator. A lower static contact is installed on the lower part of the composite insulator. A mounting plate is installed in the middle part of the composite insulator. An upper moving contact is installed on the upper part of the arrester and is fastened in the upper static contact through a trapezoid structure and a disconnector wire. A disconnector is installed on the lower part of the arrester. A disconnector leading-out cable is fixed to the lower part of the disconnector through a bolt. The leading-out cable is fixed to the lower static contact through a bolt. One end of an arrester fixing arm is fixedly connected to the middle part of the arrester and the other end of the arrester fixing arm is fixed to a lower moving contact through a pin. The lower moving contact is fastened in a lower moving contact spiral trough through extended rods at the two ends. The arrester component can be dropped off automatically to prevent an accident from being more serious. The arrester is reduced in work load and work time of operators, thereby ensuring power supply reliability.