The utility model relates to a dust exhaust head for the electric dust collector, which comprises a ground suction head 11 and a small-size suction head 10 which is arranged on the ground suction head 11 and can be assembled and unassembled freely. The small-size suction head 10 is composed of an inspiratory head 40, a rotation connection component 8 and a connecting pipe 9. The inspiratory head 40 is connected with any position between the rotation connection components 8 and between the connection rotation component 8 and the connecting pipe 9 to form a structure that one side can move up and down while the other side can rotate freely. Meanwhile the inspiratory head 40 is in a non-rotation fixing state relative to the ground suction head 11 and is inner-communicated with the ground suction head 11 when the inspiratory head 40 is arranged on the ground suction head 11.