The invention discloses a folder mechanism and a folding table, which is characterized in that: the folder comprises a face plate part, an outrigger part and a support part; the top of the outrigger and the face plate form a rotatable connection relation; the support part comprises at least a tilted strut and a locking piece; the locking piece is connected to the outrigger part; an end part of the tilted strut can be connected into the bottom surface of the face plate part in a rotating way, and the other end part can be connected with the locking piece; wherein the tilted strut and the support part can form a rotatable or a slideable connection, thus forming the face plate part, the outrigger part and the support part into a folder; the folding table or folding chair can all adopt the folder; wherein the face plate part, the outrigger part and the tilted strut and the locking part can form the folder. The folder mechanism and the folding table have the advantages of simple structure, less rod members, low manufacturing cost, stable forcing, high stability and convenient and fast folding and unfolding.