The utility model belongs to the technical field of be the technique of bent axle and specifically relates to a forced air cooling gasoline engine bent axle. It mainly comprises first rotation axis, first linking arm, jackshaft, second linking arm and second rotation axis, the one end of first rotation axis is provided with the annular knurl layer, the one end on annular knurl layer is inserted and is established on first linking arm on the first rotation axis, the one end of second rotation axis is provided with the annular knurl layer, the one end on annular knurl layer is inserted and is established on the second linking arm on the second rotation axis, the both ends of jackshaft all are provided with the annular knurl layer, the one end of jackshaft is connected on first linking arm, the other end of jackshaft is connected on the second linking arm. This forced air cooling gasoline engine bent axle, simple structure adopts split type equipment to improve operating personnel's easy -to -use nature, improves the utilization efficiency of bent axle, reduces cost of maintenance to improve the availability factor of whole air -cooled gasoline engine.