The invention discloses a line patrol unmanned plane high-reliability remote control information transmission method based on the MIMO and relates to an application space diversity reception device for detecting or preventing error in received information. The method comprises the following steps: firstly, performing the separation of a real part and a virtual part on a complex modulation signal subjected to the constellation labeling; secondly, performing serial-parallel conversion on real-part data and virtual-part data which are separated; thirdly, enabling 16 data on two parallel layers to form a column vector, multiplying the column vector with an encoding matrix to complete the pre-coding operation. The high-reliability remote control information transmission method based on the MIMO is applied to a line patrol unmanned plane. According to the invention, the space-time coding is adopted at a ground control station, so that additional diversity gain is provided for a system, the channel disturbance resistance is better, and the probability of occurrence of instruction transmission error is reduced; in the situation that the system feedback expense is not added, the receiving end is enabled to obtain higher signal-to-noise ratio, and the reliability of a remote control remote-measuring system is improved.