Belonging to the technical field of dyeing liquid wastewater treatment, the invention discloses a hair product industry dyeing liquid wastewater recycling and reuse treatment device and an operation method thereof. According to the key points of a technical scheme, the treatment device comprises a dyeing process dyeing waste liquid pool, a dyeing process flushing wastewater pool, a dyeing liquid wastewater pool, an adjustment pool, a boosting pump, a filter unit, a low pressure pump, a self-cleaning filter, a bacteriostatic modified photocatalytic ultrafiltration membrane apparatus, a reverse osmosis water inlet case, a reverse osmosis boosting pump, a security filter, a high-pressure pump, a reverse osmosis membrane apparatus, and a flushing liquid storage tank. The invention adopts the dyeing process with large wastewater yield as the research object, combines the research results of hair product industry dyeing liquid recycle technologies, employs a bacteriostatic ultrafiltration membrane and reverse osmosis membrane double-membrane combined technology, performs in-situ water quality upgrading on dyeing liquid wastewater to achieve reuse, so that the dyeing liquid reuse rate reaches more than 80%, thus effectively saving fresh water dosage, and basically achieving the purposes of zero discharge of wastewater and reuse of dyes.