Camshaft of diesel engine

The utility model relates to the technical field of camshafts, in particular to a camshaft of a diesel engine, which comprises a transmission mechanism and a cam mechanism. The transmission mechanism comprises a shaft rod, a plurality of positioning insertion pieces evenly inserted into the shaft rod, a plurality of insertion rods inserted into transverse holes in the positioning insertion pieces, a first clamping cylinder movably installed at one end of the shaft rod, and a second clamping cylinder movably installed at the other end of the shaft rod. The main shaft head and the auxiliary shaft head are inserted into the two ends of the shaft rod respectively, and the screws penetrate into the main shaft head and the auxiliary shaft head and are connected into the shaft rod. A plurality of positioning inserting pieces which are distributed in a circumferential mode are inserted into a groove in the outer portion of a shaft rod, and a plurality of combined core tubes are installed in the grooves in the outer p