The trailer docking device is a trailer hitch mounting dock with which can be secured to a trailer when the trailer is detached from the tow vehicle. The trailer docking device enables its user to load and unload the trailer while it is parked in a garage, warehouse, carport or parking slab. The trailer docking device is steel constructed, height-adjustable, permanently mounted receiver hitch that is bolted to concrete slab flooring. The trailer docking device is vertically adjustable and includes a mounting base which may be used to affix the device to a permanent surface, such as a cement slab or asphalt surface, and a trailer hitch mounted at the top of a telescoping riser assembly. An empty trailer can be secured to the trailer docking device in the same fashion as mounting a trailer to a tow vehicle, and once coupled, the trailer can be loaded and unloaded. This allows for more efficient use of garage space. Generally, when trailers are not in tow, they are not intended to bear the weight of a load because they easily tip rearward when the trailer coupler is unattached. The trailer docking device secures the trailer coupler to the ball hitch and facilitates the functionality of being able to load and unload the trailer.