Crystallization method of large-particle nylon 10T salt

The invention discloses a crystallization method of large-particle nylon 10T salt. The crystallization method comprises the following steps: preparing a decamethylene diamine aqueous solution and terephthalic acid dispersion liquid; adding the decamethylene diamine aqueous solution into the terephthalic acid dispersion liquid under stirring; introducing nitrogen or inert gas into the second jacket reaction kettle to enable the pressure to be 0.4-0.6 MPa, raising the temperature of liquid in the reaction kettle to 130-160 DEG C, and reacting for 2-5 hours; cooling the liquid in the jacketed reaction kettle to 120-125 DEG C, adding a nylon 10T salt seed crystal, and continuously cooling to 100-119 DEG C; the temperature in the jacketed reaction kettle is reduced to 20-70 DEG C at the cooling rate of 2-5 DEG C/min, centrifugal separation is conducted, and the large-particle nylon 10T salt is obtained and has the advantages of being large in particle size, uniform in particle size distribution, low in water conte