The invention relates to a processing method for hiding and displaying a three-dimensional rebar model for the purpose of solving the problem that the reviewing operation is performed on the model with working difficulty due to dense distribution of rebar. The processing method for hiding and displaying the three-dimensional rebar model is provided by the invention. The method comprises following steps of: firstly, selecting rebar groups needed to be hidden and displayed according to numbers and determining rebar displaying-hiding modes and rebar displaying-hiding types; secondly, establishing rebar displaying-hiding arrays, searching and sorting rebar according to numbers and determining rebar objects to be hidden according to different displaying-hiding modes; thirdly, arranging hidden marks on rebar objects of rebar groups and storing the hidden marks of rebar objects to the rebar displaying-hiding arrays; and finally, carrying out display-hiding operation on rebars according to corresponding relations among real hiding arrays and the rebar objects. The processing method for hiding and displaying the three-dimensional rebar model is suitable for fields such as civil engineering, civil construction, port and navigation and water and electricity.