The invention relates to the field of environmental engineering, in particular to a biological thickening treatment method and a biological thickening device for high-salt organic chemical waste water.The device sequentially comprises a conditioning pool, a hydrolysis acidification pool, a biochemical pool and a settling pool.A waste water lift pump is arranged on a pipeline between the conditioning pool and the hydrolysis acidification pool.A primer is arranged at the position, in front of a water inlet of the waste water lift pump, of the pipeline.The hydrolysis acidification pool is of a sealed structure, and a pulse water distributor and a waste gas collecting opening are arranged at the top of the hydrolysis acidification pool.One end of the pulse water distributor stretches into the bottom of the hydrolysis acidification pool and is connected with an umbrella-shaped water distributing pipe.A water outlet of the waste water lift pump is connected with the pulse water distributor through a pipeline, and an electromagnetic flowmeter is arranged on the pipeline.A swirl-mixing aerator and a strip type biocarrier are mounted in the biochemical pool.A sludge pump is arranged outside the settling pool in a connected mode, and an inlet of the sludge pump is communicated with the bottom of the settling pool.The device is adopted for waste water treatment, and therefore the aim of treatment and up-to-standard drainage of the high-salt organic chemical waste water is achieved.