The invention provides an electrostatic-fabric integrated dust collector for cooperatively removing Hg and SO3. The electrostatic-fabric integrated dust collector for cooperatively removing Hg and SO3comprises an inlet flue, an inlet seal head, an electric area and a bag area which are sequentially arranged according to the flow direction of flue gas. A dry powder injection device is arranged inthe inlet flue, and a turbulence device is arranged in the inlet seal head; a flow guide device is arranged between the electric area and the bag area, and an airflow distribution box is arranged in the bag area; the top of the airflow distribution box is provided with a high-purity air chamber which communicates with the airflow distribution box; a coarse ash discharge pipeline is arranged belowan ash hopper of a first electric field of the electric area; a discharge end of the coarse ash discharge pipeline is provided with a coarse ash collecting device; a discharge end of the coarse ash collecting device is provided with a mechanical grinding and crushing device; a discharge end of the mechanical grinding crushing device is connected with a feeding end of a dry powder injection conveying pipeline through a medicament modification system; and a discharge end of the dry powder injection conveying pipeline is connected with the dry powder injection device. The electrostatic-fabric integrated dust collector is low in operation cost, has functions of ash pre-coating, Hg removal, SO3 removal and the like, and meets discharge standards.