In order to predict the electrical behavior of Schottky diodes, a large number of modeling and simulation have been presented. A novel transmission line modeling and its equivalent circuit of Schottky diode are developed in this paper. A SPICE code is written to describe this model and the simulation can be executed by WINSPICE program. Schottky diodes are fabricated and the I-V characteristics are measured. The measured I-V curves are obtained from HP4156A and compared to the simulated I-V data. The results show that the measured I-V curves are in good agreement with the simulation results based on the transmission line modeling.