1. A method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video, comprising the following steps: S 1. carrying out binocular parallax and movement speed analysis on an input binocular video, and calculating a binocular parallax d, a movement speed vxy in a visual plane direction and a movement speed vz in a depth direction of each pixel point in the video; S 2. calculating a corresponding comfort degree value c according to the parameters (d, vxy, vz) of each pixel point; S 3. calculating a comfort degree value of an entire frame according to the calculated comfort degree value of each pixel point; and S 4. calculating the comfort degree value of the entire video according to the comfort degree value of each frame, wherein the step S 2 comprises: calculating the comfort degree value c at the pixel point according to the parameters (d, vxy, vz) calculated in the step S 1 , in accordance with experimental fitting comfort degree calculation formulae: 
 c=− 0.0556 *vxy− 0.6042 *vz+ 0.0191 *vxy*vz+ 0.0022 *d*vxy+ 0.1833 *d*vz− 0.6932 *d+ 4.6567( d>= 0), 
 c=− 0.0556 *vxy− 0.6042 *vz+ 0.0191 *vxy*vz− 0.0043 *d*vxy− 0.1001 *d*vz+ 0.2303 *d+ 4.6567( d< 0).