The invention discloses an expressway multi-source heterogeneous data quality evaluation and control method. The expressway multi-source heterogeneous data quality evaluation and control method comprises the steps of firstly establishing a spatio-temporal data unified perception data format, recognizing original data delay and performing time point correction, then performing integrity degree judgment, recognizing and marking spatial missing data in the same time period, including data which are not detected by a detector and incomplete data, conducting accuracy judgment on data records according to traffic characteristics, recognizing and marking wrong data, judging whether data parameters meet the consistency requirement or not, further utilizing spatio-temporal correlation to conduct multi-dimensional data recovery on data with 0 data quality zone bits, and finally updating a database. The expressway multi-source heterogeneous data quality evaluation and control method has the advantages that multi-source information resources are fully utilized, traffic data quality is ensured on the aspects of accuracy, consistency, integrity and real-timeliness, the spatio-temporal correlation is utilized to perform multi-dimensional data recovery according to the actual situation of an expressway, and a foundation is laid for follow-up traffic information fusion.