The invention relates to a preparation technology of salt, in particular to a preparation technology of solar salt. The preparation technology of the solar salt comprises the specific steps of 1, making saturated brine from
seawater, and transporting the saturated brine to a purifying pond through a pipeline for
filtration and purification so as to filter off biological dead bodies,
plant residual bodies,
atmospheric dust fall and the like in the saturated brine; 2, adding the purified pure brine into a
crystallization pond, controlling the depth of water in the
crystallization pond to be 5-10cm, and during sun-curing, performing salt
spinning and brine
spinning with a rotary rake; 3, when the
sodium-
magnesium ratio of the brine is smaller than or equal to 2, stopping
crystallization; 4, when the particles of the salt reach to 0.5-2.0mm and the
evaporation amount of the salt reaches to 7mm, collecting the salt, when the salt needs to be collected, gathering the salt into heaps through cleaning tools, washing the salt with cleaning brine, then performing vacuum suction
filtration and dehalogenation on the salt, and when the
water content of the salt is smaller than or equal to 5.4%, stopping the operations of vacuum suction
filtration and dehalogenation; and 5, preserving the obtained solar salt, packaging the preserved solar salt, and enabling the packaged solar salt to appear on the market.