Disclosed is an insulation structure used for an electric garden tool. The electric garden tool comprises: a shell; an electric motor (2) arranged on the shell and used for providing power, the electric motor comprising an output shaft (22); and a blade (14) connected to the output shaft (22), the electric motor (2) driving the blade (14) to work in a rotating manner by means of the output shaft (22). The insulation structure is arranged between the output shaft (22) and the blade (14) so as to realise an insulation matching connection between the blade (14) and the output shaft (22), wherein the insulation structure comprises a connecting base (3), the connecting base (3) comprises a main body portion (31) made of insulating materials, the main body portion (31) is provided with an output shaft connecting portion connected to the output shaft (22) in a fastening and matching manner, and at least two blade connecting portions connected to the blade (14) in a fastening and matching manner, and the output shaft
