The invention relates to a virtual experiment teaching platform based on Unity3D, which comprises a base, a notch, a stepping motor fixing base, an adjusting nut, a stepping motor, an encoder, an active synchronous pulley, a synchronous belt, a column, a cross beam, a sliding groove, a moving link, a sliding block, a position limiting switch, a control panel, a driven synchronous pulley mounting base and a driven synchronous pulley. The platform is characterized in that programs are edited in the control panel, and then virtual experiments are carried out; and after that, actual experiments are performed. The platform of the invention reduces the cost of laboratory teaching, increases the visualization degree of the experiments, improves the intelligent and visualization level of laboratory teaching, and facilitates the reform and development of laboratory teaching.