The invention discloses a multi-source position data consistency check and fusion method and system. According to the method, distribution consistency of multi-source position data is checked from a time distribution law and a spatial distribution law; and for the multi-source position data with inconsistent time-space distribution, time-space fusion of the multi-source position data is performed by utilizing a time-space warp operation to generate position data with a wider space covering range and a higher penetration rate, and the availability and reliability of the multi-source position data are improved.