Efficient superspeed effective load data transmission system for remote sensing satellite

The invention provides an efficient superspeed effective load data transmission system for a remote sensing satellite. The efficient superspeed effective load data transmission system comprises a variable bit rate coding module, a data modulation multiplexing module, a microwave signal transmitting module and a system control module; the system control module calculates an encoding rate of a low-density parity-check code, a modulation order of amplitude phase shift keying and a turntable angle of a bearing antenna according to the relative positions of a satellite and a ground station; the variable bit rate coding module finishes channel coding of effective load data, and constitutes a data transmission frame; the data modulation multiplexing module realizes amplitude phase shift keying modulation of the data transmission frame, and performs orthogonal frequency division multiplexing on a transmission code element signal on a plurality of sub channels, after that, the transmission code element signal becomes