Guide block for fully-variable valve lift control mechanism

The utility model discloses a guide block for a fully-variable valve lift control mechanism. The guide block comprises a guide block body, two guide arc bosses (1) are arranged on one side of one end of the guide block body, the end face of each guide arc boss (1) is an arc surface, and the end faces of the guide arc bosses (1) are matched with needle bearings of a combined rocking arm; the two opposite side faces of the guide arc bosses (1) form axial thrust surfaces (2) playing a role in axial thrust positioning of output rocking arms on two sides of the combined rocking arm; guide block mounting holes are arranged in the other end of the guide block body, different intake valve lifts can be outputted, and the combined rocking arm is enabled to be under a load balance state under the different lifts.