Aiming at vertical microstrip transition in multilayer designs, a novel structure of millimeter vertical microstriptomicrostrip is proposed in this paper. In this design, the vertical microstrip transition implements matching through compensation structure on the microstrip. Then the microwave signal can transmit in different layers. It has the advantages of low insertion loss, broadband and easy to produce. All this indicates the structure has a good applicable worthiness in microwave circuit designs. The proposed structure is designed by software, then fabricated and tested. The results show that the insertion loss and return loss is respectively below 2.7 dB (include the insertion loss of two K2.92 mm joints and microstrip transmission line) and above 9 dB from 0.5 GHz to 38 GHz.