In order to simplify the wet joint cast-in-place construction of bridge deck, a kind of ring rebar mutual-inserted supporting plate for wet joint is proposed. Due to the bridge deck mainly bearing the reciprocating vehicle loads, the fatigue behavior of this wet joint is studied by the experiment method. The static experimental study is carried out at the stop of the main time of fatigue experiment. The experiment shows that the rigidity of the members is basically unchanged without the obvious cracks in the process of fatigue loading. The comparison of static experimental results in the fatigue experiment shows that the rigidity of the members is not obviously changed. The comparison of the static experiment after fatigue loading and the matched group test shows that the damage occurs at the interface between the wet joint and the prefabricated bridge deck, and the rigidity of the members is not obviously changed.