The invention provides a double-liquid shallow-mixing in-situ chemical oxidation repair method for contaminated soil and groundwater and belongs to the technical field of contaminated soil and groundwater repair methods. The method comprises the following steps of (1), site leveling and zone measuring, (2), surface crushing and screening and cofferdam building, (3), shallow mixing equipment assembling and debugging, (4), agentia dispensing, wherein an oxidizing agent is dispensed to a first dispensing station, a catalyst, an inhibiter and a pH modifier are dispensed to a second dispensing station, and a double-liquid dispensing system is formed; (6), adding and shallow mixing construction of the double kinds of liquid dispensed to the first dispensing station and the second dispensing station, (7), surface layer curing, (8), agentia reaction and monitoring and (9) self-inspection and acceptance. According to the method, mixing equipment with an excavator and professional mixing heads and the double-liquid dispensing system are adopted, in-situ mixing can be achieved while an agentia solution is added, the reaction period is short, and the problem of the shallow contamination of the soil and groundwater can be solved.