In the material flowing production process of the continuous/discrete hybrid system, this paper implements three-dimensional simulation of a virtual workshop's materiel flowing production process by using the open-source software package of OSG(Open Scene Graph). To exploit a virtual simulation system with good performance, it has established a reasonable system of virtual objects, which works out the relationship of model object in the scene modeling with simulation object in the three-dimensional simulation making the whole operation process run with higher efficiency. The paper finally implements three-dimensional simulation of a new hybrid system by using the mechanism of simulation timer advancement and message- based event scheduling, which effectively combines discrete event with continuous system.