The invention is suitable for the technical field of data management, and provides a data quality verification method and a system based on double helix management, and the method comprises the steps:obtaining a business demand and a data demand, carrying out the tracing of the business demand and the data demand, and generating business tracing information and data tracing information; formulating a service specification according to the service traceability information, performing data evaluation according to the data traceability information, and formulating a data optimization scheme according to an evaluation result; implementing business processing according to business specifications, and implementing data optimization according to a data optimization scheme; and performing data verification on the local database, and performing data replacement according to a verification result. According to the method, service requirements, service traceability, service specification formulation and service processing implementation are designed; a service closed-loop structure is formed, a data closed-loop structure is formed through data demand acquisition, data tracing, data evaluation and data optimization design, a double-helix management mechanism is formed through the service closed-loop structure and the data closed-loop structure, and the data management efficiency is improved.