A method of combining RS frequency coding and LT coding concatenated for wireless data transmitter-receiver is presented in this paper. Its superiority to the traditional LT code in decoding probability is analyzed as well. The proposed method features well in performance in the application of mass data transmission in low signal-to-noise ration environment. The results of simulation indicate that this method can recover the transmitted information efficiently and improve the quality of the received image even under the condition of low signal-to-noise ratio.