Electric trimming chain saw convenient to extend

The utility model discloses a trimming electric chain saw convenient to extend, which comprises an electric chain saw main body, a guide plate chain driven by power is arranged at the top of the electric chain saw main body, an electric chain saw plug-in base is arranged at the bottom of the electric chain saw main body, and a power switch is arranged on the electric chain saw plug-in base. The lower end of the electric chain saw body is used for being connected with a lithium battery base or an extension rod, a lithium battery is arranged in the lithium battery base, the lithium battery base is electrically connected with a power switch, a locking switch and a power device for driving a guide plate chain in sequence, and a machine connecting base is arranged at the top end of the extension rod and buckled with an electric chain saw inserting base at the lower end of the electric chain saw body. The extension rod further comprises an aluminum alloy telescopic rod fixed to the lower end of the machine connecti