A technology for manufacture a drive block of a drive chain include positioning block, Concave mold, support block one, Bottom plate, support block two, Bottom plate, locating pin, Connecting plate, fulcrum block, Connect the pin shaft to the crowbar, the positioning block is movably connected with the female die, As soon as the support block is below the female die, the lower pad plate is installed below the support block 1, A support block 2 is arrange below that lower pad plate, and connected to the base plate, A low cushion plate is provided with hole, positioning pin is installed in the hole, A loc pin tip is tightly fitted to that connecte plate, A fulcrum block is arrange on that right side of the upper end of the bottom plate, Crowbar and fulcrum block, A link plate is connecte inseries with a connecting pin shaft, The invention adopts the semi-open structure, the mold is simple and practical, the loading and unloading of the parts are convenient, the mechanism of the connecting rod rotation is added in the mold, the unloading space of the driving block is increased, the center of gravity is outwardly shifted due to the special shape of the driving block, the magnet steelis designed on the side of the mold concave mold, and the phenomenon of the driving block outwardly turned due to the center of gravity outwardly shifted is avoided.