In the existing universal verification methodology（ UVM） verification platform

the verification components are tightly coupled to device under test（ DUT）

resulting in poor reusability; on the other hand

the definition of UVM transaction uses the Field-Automation mechanism

call path is too long

increase simulation time of test cases. So

a design of public library for serial bus protocol verification is proposed

use hierarchical modeling method to design a reusable public library

by overrwriting virtual function method to improve the traditional transaction definitions. The experimental results show that the public library can be used to quickly build a serial bus verification platform

the improved transaction can shorten the simulation time of 10. 7 %

improve the verification efficiency.