A video signal sending device includes: a video dividing unit, more than one video adjusting unit and a video composite unit. Each video adjusting unit receives more than one video signal from the video dividing unit and adjusts an original frame rate of each video signal to more than one new frame rate. The video composite unit is used to combine each video signal to a composite video signal, and send the composite video signal to a remote end by a transmission channel. A maximum frame rate of the transmission channel is equal to sum of each new frame rate or the original frame rate, thereby improving the efficiency of video signal transmissions.