A polycrystalline diamond pick-rod machining process comprises the following steps of firstly, machining a pick-rod body, forming a prefabricated groove in an end of the working end of the pick-rod body, and machining a polycrystalline diamond composite piece at the same time; secondly, inlaying the polycrystalline diamond composite piece in the prefabricated groove; thirdly, conducting quality examination; fourthly, conducting surface corrosion prevention processing after examination is conducted; fifthly, conducting packaging and putting a pick-rod in storage. The strength, the abrasion resistance and the impact resistance of the pick-rod machined according to the process are improved, the pick-rod is not prone to fracture and bending under high-frequency continuous work, the service life is greatly prolonged, and work efficiency is greatly improved.