The invention discloses desulfurization wastewater treatment equipment and a treatment method thereof. The equipment comprises a pretreatment unit, a VSEP wastewater concentration unit and an MVR wastewater evaporation unit, wherein the pretreatment unit comprises a wastewater collection box, a neutralization box, an electronic flocculator, a filter precipitation pool, a middle water tank and a decoloring device in sequential connection; a water outlet of the decoloring device is connected with a water inlet of the VSEP wastewater concentration unit; a water outlet of the VSEP wastewater concentration unit is connected with the MVR wastewater evaporation unit. The wastewater treated by the desulfurization wastewater treatment equipment reaches the industrial water use standard; the recovery and the utilization can be realized. The sludge treated by the desulfurization wastewater treatment method does not need outward transportation treatment; the operation cost is reduced; the desulfurization wastewater treatment method has the advantages that the energy consumption is low; the occupied area is small; the efficiency is high.