The invention discloses a diesel pump body die casting technology. The diesel pump body die casting technology comprising the following steps of (1) equipment installing, specifically, a squeezing casting die is installed on extrusion casting equipment, and the squeezing casting die is preheated; (2) mold cavity filling, specifically, after the mold cavity in the squeezing casting die is vacuumized, molten metal liquid is washed into the mold cavity of the squeezing casting die through a squeezing opening, the temperature of the metal liquid is 620-680 DEG C, and the metal liquid comprises, byweight, 99.5-99.84% of ZL107 aluminum alloy, 0.04-0.1% of aluminum titanium boron and 0.12-0.45% of rare earth; (3) squeezing casting forming, specifically, a pushing rod is mounted in the squeezingopening, and in the process of metal liquid condensing and forming, squeezing is conducted in the metal liquid by using the pushing rod to form a feeding hole; and (4) demoulding. By means of the diesel pump body die casting technology, cooling shrinkage cracks of large thick wall parts can be compensated, the compactness of a casting is ensured, the qualified rate and the production efficiency ofthe large thick wall parts are improved greatly, remainder materials are few, the machining allowance is very few, the casting cost is very low, and the casting quality can also be ensured.