Abstract: We design the adjustable DC stabilized voltage supply based on Multisim12 virtual electronic experimental platform, and use virtual instrument measure circuit parameters, analyze circuit performance and improve the design. Through simulation test, the voltage supply is good performance and reliable. The important performance indexes of voltage supply meet the requirement of electric circuit experiments, such as output voltage and current, voltage stability coefficient, etc. Using Multisim12 design circuit effectively improve the design speed, save design time, and reduce the design cost.