A　model　for　forecasting　the　switching　power,　leakage　power　and　delay　of　the　multiple-supply　dynamic　OR　gates　based　on　wavelet　neural　networks　in　45　nm　technology　is　proposed.　By　studying　the　impact　of　the　multiple-supply　technique　(MST)　on　the　power　and　delay　characteristics,　the　proposed　forecasting　model　could　forecast　the　nonlinear　changing　of　the　switching　power,　leakage　power　and　delay　of　the　different　inputs　dynamic　OR　gates　with　fast　speed　convergence　and　high　precision.　At　last,　the　trend　of　the　forecasting　curve　is　discussed