The utility model provides a fodder make -up machine, this fodder make -up machine use the simple construct easily to detect the circumstances of bale shaping as the regulation diameter. The utility model discloses a fodder make -up machine possesses: the contact piece is in the mode contact with the angle that has the regulation of the outer peripheral face of bale, induction rod, with contact piece pivot suspension in the same epaxial to the contact piece rotates with being integrative, the fly leaf rotates with induction rod's pivot suspension axle and sets up freely in the same epaxial to with the mode setting that can adjust this turned position, the sensor sets up in the fly leaf to the diameter size of bale is detected out through the inclination who detects the contact piece, and force applying portion, towards the front end of contact piece with the direction application of force that the bale periphery is met.