Ash-free gasoline antiknock

The invention relates to an ash-free gasoline antiknock, which belongs to the field of gasoline fuel oil additives. The ash-free gasoline antiknock is used for boosting octane of the gasoline and reducing knocking in a fuel combustion process. The ash-free gasoline antiknock is mainly synthesized by organic acid amide, organic phenol (alcohol), ester, amine and the like with a combined chemical method.