The invention discloses an oil press machine with a movable oil press mechanism; the oil press machine comprises a frame; the frame is provided with a feed device, a transfer mechanism, and a movable oil press mechanism; the end face of the bottom end of an upper feed barrel radially extends outwards to form an extension portion; the end face of the top end of a lower feed barrel radially extends outwards to form an extension portion; the upper feed barrel is used for connecting with the feed device; the upper and lower feed barrels can mutually move; the upper feed barrel is plugged with a material control board; the outer end of the material control board is hinged to one end of a rotary bar; the rotary bar rotates around a rotary pin; a press barrel is provided with a trigger piece positioned to match with the other end of the rotary bar; the oil press machine also comprises a tension spring used for resetting the material control board. The press barrel and the material control board can be regulated to realize dynamic balance, thus adapting to different work conditions; the material control board can be automatically regulated in the moving process of the press barrel, thus adapting to oil seeds of different sizes.