The utility model relates to a novel oil filter adapter, which comprises a first flange and a second flange. An oil-inlet oil circuit and an oil-return oil circuit are arranged between the first flange and the second flange. The oil-inlet oil circuit comprises an upper oil-inlet oil way and a lower oil-inlet oil way, wherein the upper oil-inlet oil way and the lower oil-inlet oil way are mutually communicated. The tail end of the lower oil-inlet oil way is connected with the plug of the oil-inlet oil circuit. The oil-return oil circuit comprises an upper oil-return oil way and a lower oil-return oil way, wherein the upper oil-return oil way and the lower oil-return oil way are mutually communicated. The tail end of the lower oil-return oil way is connected with the plug of the oil-return oil circuit. The lower oil-inlet oil way is also communicated with an oil-inlet pipeline arranged on the second flange. The lower oil-return oil way is also communicated with an oil-outlet pipeline arranged on the second flange. The novel oil filter adapter has the advantages of simple structure and reasonable design, and facilitates the reduction of both manufacturing difficulty and manufacturing cost. Meanwhile, the mounting and dismounting difficulties of the oil filter of a front-wheel-drive type engine are effectively relieved. In addition, the novel oil filter adapter meets the technical requirements of small-displacement engines in spatial compactness.