The invention discloses a manufacturing method for a machining tool and relates to the technical field of machinery. The manufacturing method comprises the following steps: S1, obtaining raw material composition: the adopted raw materials comprise the following components in percentages by weight: 58-62% of diamond powder, 30-38% of titanium and 4-8% of a fusion agent; S2, adding the raw materials in the S1 into a stirring tank to be uniformly stirred, wherein the stirring time is 10-20 minutes; S3, warming the mixed raw materials in the S2, performing injection molding after warming, and then putting a mould in water to be cooled; S4, demoulding an injection molding workpiece in the S3, and after demoulding, quenching the workpiece; and S5, performing surface polishing on the quenched workpiece in the S4, and coating polishing powder on the workpiece during polishing. The manufacturing method disclosed by the invention facilitates quick machining conveniently, and is high in work efficiency, time-shortening and simple to operate.