The invention relates to a grounding connector for an ancillary facility of a prefabricated bridge deck. The grounding connector comprises a metal fixing part (1), embedding mounting bases (3) and a flow guide plate (2). The metal fixing part (1) is used for assembly connection of the flow guide plate (2) and the embedding mounting bases, the embedding mounting bases (3) are embedded in the uppersurface of the bridge deck, and the flow guide plate (2) is embedded in a baseplate of the ancillary facility of the prefabricated bridge deck; the embedding mounting bases (3) are in vertical serialconnection in the bridge deck, and a grounding terminal in the ancillary facility of the prefabricated bridge deck is connected to the flow guide plate (2). The grounding connector for the ancillary facility of the prefabricated bridge deck is grounded and is in serial connection in the bridge deck, power generation integration of the ancillary facility of the bridge deck is achieved, the grounding efficiency is improved, the better grounding effect is achieved, the splicing complexity of the prefabricated bridge deck is lowered, the construction period is shortened, and the integrality of theancillary facility of the prefabricated bridge deck is improved.