The invention discloses a recycling and reusing method for oil-bearing mixed liquor generated during offshore exploration and development operation. The method includes the following steps that S1, the oil-bearing mixed liquor generated in testing is temporarily stored in a platform liquor storage tank and heated to a certain temperature; S2, a pour point depressant is proportionally added into the platform liquor storage tank according to characteristics of crude oil; S3, the oil-bearing mixed liquor of the platform liquor storage tank is delivered to an environment-friendly ship cabin through an oil delivery pump by means of a pipeline; S4, nitrogen of a certain concentration is injected into the environment-friendly ship cabin, and inerting treatment is carried out on the oil-bearing mixed liquor; S5, a heating system of the environment-friendly ship cabin is started to keep the temperature of the oil-bearing mixed liquor between 40 DEG C and 60 DEG C; S6, the oil-bearing mixed liquor in the environment-friendly ship cabin is delivered to a buffer tank through a pipeline; and S7, the oil-bearing mixed liquor in the buffer tank is delivered to a production system through a production platform output pump. Through the method, the oil-bearing mixed liquor can be delivered to an environment-friendly ship from a drilling platform and then transported to be delivered to a production platform and enter the production system, and the environment-friendly requirements of zero pollution and zero emission are met.