The invention provides a folding worktable, which comprises a production line worktable (1), wherein the production line worktable (1) is composed of a panel (10) and legs (11), wherein the legs (11) are arranged under the panel (10) and used for supporting the panel; one side of the production line worktable (1) is connected with a folding table (2); the folding table (2) comprises a table board(20) and a support unit; the table board (20) is pivoted with the panel (10) of the production line worktable (1); and the support unit is arranged under the table board (20) in a folding mode. In the folding worktable provided by the invention, the folding table is pivoted with the side of a conventional production line worktable; when the working table board is required to be broadened, the folding table is unfolded, so that the table board of the folding table is connected with the panel of the production line worktable, thereby being convenient to splitting joint; and when the folding table is not used, the support unit of the folding table can be folded, and the table board of the folding table is rotated and then placed at the side of the production line worktable, thus being convenient to fold and saving additional storage space.