The invention discloses a folding hidden type operation rod of a rubber pulverizer. The folding hidden type operation rod comprises an inner shaft rod and a holding handle. The holding handle is arranged in a hollow manner. The outer surface of the inner shaft rod can be sleeved with the holding handle. A linkage structure for the holding handle to horizontally rotate and slide front and back axially is arranged between the holding handle and the inner shaft rod. A notch needed for rotation of the holding handle is formed in the bottom of the holding handle. The operation rod can be embedded in a rack, the situation that the externally-arranged operation rod occupies the excessive space, consequently, an operator mistakenly touches the operation rod during walking, and the distance between grinding discs in the pulverizer is changed is prevented, and the production safety is improved.