The utility model discloses a single-shaft multi-shift-fork mechanism of an automobile transmission, which comprises a shift fork shaft; a first shift fork, a second shift fork, a third shift fork and a fourth shift fork are arranged in sequence on the shift fork shaft; the first shift fork is fixedly connected with the shift fork shaft; the second shift fork, the third shift fork and the fourth shift fork are connected with the shift fork shaft in a sliding manner; a shift fork frame corresponding to a gear shifting block is fixed on the shift fork shaft; and a second shift fork arm, a third shift fork arm and a fourth shift fork arm, which are corresponding to the gear shifting block, are arranged on the second shift fork, the third shift fork and the fourth shift fork respectively. According to the utility model, a corresponding speed changing finger in a shifting block is chosen through a gear shift lever to independently control the movement of different shift forks, so as to engage a corresponding sliding gear or shift sleeve to with a corresponding gear and to realize the function of gear shifting. Therefore, the single-shaft multi-shift-fork mechanism has the advantages of simple structure, small occupied area and low cost.