The invention provides a method for improving the transmission efficiency of an electric telecontrol 102 protocol, and relates to the technical field of electric power transmission. The method is a method for improving the transmission efficiency by utilizing the frame length of a variable-length frame, and comprises the following steps of: 1) judging whether the current acquisition is finished ornot; 2) acquiring 34 quantities of table code data at one time; 3) performing group uploading of frames; 4) judging whether the frame length exceeds 64k or not; 5) no data existing in frames; 6) performing group no-data frame; 7) returning to 1, and 8) returning to 2. According to the method, the frame length of the variable-length frame is directly and reasonably utilized, the data size of eachtime of transmission is increased, the transmission frequency is reduced, the influence of the frame length on data transmission is overcome, the transmission efficiency is fundamentally improved, manual intervention is not needed, and the maintenance cost is not needed.