A financial self-help service device for preventing plugging by foreign objects and damage by mucilage glue is provided. It has a panel, and a cash inlet-outlet (1) is set on the panel. The financial self-help service device further includes a gate (2) for opening or closing the cash inlet-outlet (1). POM (polyoxymethylene) plastic convex points (9) are provided at the edge of the gate (2) matched with the cash inlet-outlet (1), so as to form a flow guide gap between the gate (2) and the panel when the gate (2) closes the cash inlet-outlet (I).