Diamond fine powder morphology trimming method

The invention belongs to the technical field of diamond fine powder, and particularly relates to a diamond fine powder morphology finishing method. Comprising the following steps: mixing fine diamond micro-powder and coarse diamond micro-powder with the particle size of 10 microns, putting the mixture into an airflow shaping tank, and introducing airflow to carry out morphology finishing; the mass ratio of the fine diamond micro powder to the coarse diamond micro powder with the particle size of 10 micrometers to the coarse diamond micro powder is (7-4): (3-6). According to the method, diamond fine micro powder and 10 [mu] m coarse diamond micro powder are mixed together according to a certain proportion, the mixed materials are carried by airflow to rotate at a high speed, the fine micro powder is rubbed and sheared by utilizing kinetic energy which is generated by the 10 [mu] m coarse micro powder under the driving of the airflow and is larger than that of the fine micro powder, and the morphology of the fi