The utility model provides a flax turns over pressure of fiber crops machine and spreads copying device, direction through the regulation rotating circular disk changes the height of pressing fiber crops wheel and ground, clockwise rotation, the device rises along the axial, the counter -clockwise turning descends along the axial, lock with locking bolt after adjusting suitable position, it prevents that flax from twining to and presses on the fiber crops wheel main shaft to prevent twining bounding wall combination outward, it can prevent that fiber crops shop is along with pressing numb lowpressure cavity width child to curl up to press the shop to lead numb pole, it is regular that the messenger picks up hou mapu, the wide child of low pressure cavity has higher elasticity and wearability, it spreads to have the compaction fiber crops, do not hinder numb stem, profile modeling function everywhere. The device is connected with the seam of pickup frame, and along with rise the floating of soil, thin and thick that fiber crops were spread, the wide child of this low pressure cavity can be fluctuated, profile modeling everywhere, and the compaction fiber crops are spread, pick up the operation and lay a good foundation for follow -up. Can improve flax through the device and pick up rate and numb effect of spreading the regularity, this device practicality is good, and compact structure is with low costs.