Valve rocker mechanism and diesel engine

The invention discloses a valve rocker arm mechanism and a diesel engine, and relates to the technical field of diesel engines, the valve rocker arm mechanism comprises a rocker arm shaft, the rocker arm shaft is fixedly installed on a cylinder cover of the diesel engine, and an oil supply channel is arranged in the rocker arm shaft; one end of each rocker arm is movably connected with a push rod, and the other end of each rocker arm is movably connected with a valve; the rocker arm is provided with two first oil channels, the rocker arm shaft is provided with two second oil channels communicated with the oil supply channels respectively, and when the push rod drives the rocker arm to rotate so that the rocker arm can abut against a valve to open the valve, the two second oil channels are communicated with the two first oil channels in a one-to-one correspondence mode. Lubricating oil in the oil supply channel is supplied to the push rod and the air valve. Lubricating of the rocker arm and the rocker arm shaf