Engine valve mechanism

The invention discloses an engine valve mechanism comprising a rocker shaft, a main rocker, auxiliary rockers, a lock pin component and a camshaft. The main rocker idly sleeves the rocker shaft. The main rocker is internally provided with a main oil channel and a lock pin cavity. The main oil way is communicated with the lock pin cavity. The auxiliary rockers idly sleeve the rocker shaft and are tightly attached to two sides of the main rocker. Each auxiliary rocker is internally provided with a holding cavity and an auxiliary oil channel communicated with the same. The lock pin component comprises two lock pins and an elastic member connected therebetween. Each lock pin can move between a locking position and an unlocking position; when at the unlocking position, the lock pin is totally held in the lock pin cavity; when at the locking position, part of the lock pin is located in the lock pin cavity, and the other part is located in the holding cavity on the corresponding side. The camshaft is used for driving the main rocker to act. The engine valve mechanism allows stopping of part or all of cylinders of an engine and has the advantages of high efficiency, high response speed, simple structure, long service life and low maintenance cost.