Provided in the present invention is a method for transmitting a video using quasi-continuous modulation by means of a multi-input multi-output (MIMO) channel, comprising the following steps: de-correlating a source video by means of video prediction encoding and multi-dimensional transformation so as to generate a transformation domain video residual coefficient; mapping the transformation domain video residual coefficient in parallel into one or more transmission streams by means of a sub-carrier or sub-channel optimized sorting; modulating the transmission streams in parallel into a plurality of emission output signals by means of linear normalization and quasi-continuous modulation; and emitting the plurality of emission output signals in parallel to an MIMO channel by means of a plurality of antennas or cable drivers.