Disclosed are an intelligent robot rotary noodle cutting mechanism and a noodle cutting method therefor. The mechanism comprises: a machine cabinet. A rotating shaft is provided within the machine cabinet, a rotating disk is provided on the rotating shaft, at least one blade arm is connected to the rotating disk, and at least one noodle cutting blade component is provided on the blade arm. Also provided on the machine cabinet are a driving apparatus and a transmission belt for transmitting rotary power of the driving apparatus to the rotating disk. The rotating shaft also is connected to a noodle frame component corresponding to the noodle cutting blade component. The driving apparatus drives the rotation of the blade arm and simultaneously drives the rotation of the noodle cutting component so as to perform rotary noodle cutting with respect to a noodle dough on the noodle frame component. Compared with the prior art, the intelligent robot rotary noodle cutting mechanism and the noodle cutting method therefor employ a rotary-type noodle cutting scheme, and because noodle cutting blades run at a uniform velocity in a same direction, control is easy, operation is stable, the efficiency of noodle cutting is greatly increased, mechanical noise and mechanical wear also are reduced, and the cut noodles are stable in terms of quality and evenly cut.