The invention relates to an evaporation source device of an OLED (Organic Light Emitting Diode) evaporator, which comprises a working platform, crucible assemblies and evaporation source baffle assemblies, wherein a working through hole is arranged in the center of the working platform; and at least one group of the crucible assemblies and the evaporation source baffle assemblies are uniformly and circumferentially ranked in the working through hole. The evaporation source device is characterized by also comprising crucible dredging assemblies, a probe, a hang arm and a lift component, wherein the crucible dredging assemblies are arranged in the center of the working through hole; and the probe is fixedly connected with the lift component through the hang arm and can vertically move alongwith the lift component and rotate along with the center of the working through hole. The invention has the beneficial effects that evaporation materials blocked by the crucible assemblies ranked around the working through hole can be automatically dredged; the consistency and the efficiency of production can be maintained; and the influence on the quality of OLED display devices in the course ofmanual dredging can be avoided.