The invention discloses a mechanical catcher used for placement of parts used for railway freight car. The catcher is used for enabling workpieces to be installed in a material plate (1), the material plate (1) is provide with several installation channels (3), the installation channels (3) are provided with openings on the top, the bottom of the opening is provided with throughholes. The catcher is characterized by comprising a lifting structure (2) and a mechanical catcher (4) fixed below the lifting structure (2) used for achieving lifting. The mechanical catcher for placement of parts used for railway freight car achieves automatic placement of workpieces into the material plate (1) through the mechanical catcher (4) without manual operation, and the placement has high precision, precise positions and controllable force, which solves the problems met in prior art.