Abstract: Aiming at the problems of switchable matrix, discrete lens image and poor correlation of traditional video monitoring in coal mine, this paper proposes a 3D video fusion method, which realizes the fusion and splicing of adjacent two-dimensional video images and three-dimensional scene models. At the same time, combined with multi-source information augmented reality technology, a set of real-time monitoring system of 3D video fusion for the whole mine is independently developed, which makes the original fragmented split shot image achieve space and time integrated monitoring in the real three-dimensional scene, and realizes the “one map” dynamic management of the whole mine video monitoring, provides a new technical means for the daily dispatching management and emergency command of mining enterprises.