The utility model provides an anti-falling wire clamping device which comprises a fixing frame and a movable plate that is rotatably arranged on the fixing frame. Positioning blocks are arranged on the fixing frame. The movable plate is provided with hooks. The hooks are snapped with the positioning blocks when the movable plate is closed. The anti-falling wire clamping device provided by the utility model is advantageous in that: the anti-falling wire clamping device has a simple structure and furthermore a smaller mounting space is required for the whole body; the positioning blocks are pushed to snap with the hooks of the movable plate through a reset block under function force of a reset spring, so that the movable plate can not be opened under the function force of the positioning block, and therefore wire clamping springs can not fall off from the cable.