Variable valve lift driving device rocker mechanism used for engine

The invention discloses a variable valve lift driving device rocker mechanism used for an engine. The variable valve lift driving device rocker mechanism used for the engine comprises a frame and a rocker roller, wherein the frame is provided with a molded surface, the molded surface is matched with a tappet mechanism and made to be suitable for obtaining needed valve lift to drive the tappet mechanism to do straight reciprocating motion, the rocker roller can be rotatably arranged on a part, corresponding to a cam shaft mechanism, of the frame. According to the variable valve lift driving device rocker mechanism, the molded surface of a rocker can be made to be suitable for obtaining the needed valve lift according to design requirements, for instance the molded surface is made to be a zero lift molded surface, a small lift molded surface and a large lift molded surface, the part where the molded surface is matched with the tappet mechanism can be adjusted according to different working conditions of the engine, and therefore the valve lift is changed, an ideal lift amount is obtained, and further engine power performance and fuel economy are enhanced.