The invention relates to a horizontal inhaul cable bracket device. The horizontal inhaul cable bracket device is used for supporting a horizontal inhaul cable arranged on an arch bridge and comprises a lower support and a special-shaped bearing part, wherein the bottom end of the lower support is fixedly arranged on the bridge floor; the special-shaped bearing part is placed and embedded into the top end of the lower support in a fixed mode; the top of the special-shaped bearing part is in a downward concave arc shape and is matched with the side wall of the horizontal inhaul cable; and the horizontal inhaul cable is horizontally arranged at the top of the special-shaped bearing part, so that the horizontal inhaul cable is supported. The horizontal inhaul cable bracket device can effectively provide vertical supporting for the horizontal inhaul cable, the durability demand for the horizontal inhaul cable and the bracket device can also be met, and the horizontal inhaul cable bracket device is easy to mount and maintain; and the horizontal inhaul cable bracket device can be suitable for inhaul cable design of newly-built bridges and can also be widely applied to maintenance of inhaul cable brackets of built bridges.