Combined rocker arm of mechanical continuously-variable valve lift engine

The utility model discloses a combined rocker arm of a mechanical continuously-variable valve lift engine. The combined rocker arm comprises two middle rocker arms (1), a bearing I (2), a guide block (10) and a bearing II (4), all of which are arranged on the totally variable valve lift control mechanism of the engine, respectively, and a center shaft penetrating through the upper ends of the two middle rocker arms (1) and the bearing I (2); the center shaft is supported on the bearing II (4); the bearing II (4) is matched with the guide block (10); the frictional loss of the system is further reduced by use of rolling friction; the friction loss of the engine is reduced so that the stress of the engine can be more reasonable.