Sonic drilling rig is widely used in the field of environmental investigation because it does not use drilling fluid and has no pollution to the formation. The drilling efficiency can be greatly improved if the double eccentric shafts of the sonic drilling rig are synchronized at high speed. This thesis systematically analyzes the synchronization mechanism of double eccentric shafts of sonic drilling rig from the common structure and principle of flow and load synchronization， as well as its synchronization accuracy， advantages and disadvantages， and puts forward the synchronization idea at high speed， so as to provide reference for its perfection and promotion.