I assume you are trying to find which blocks to use in Simulink in order to model the system in your attached image.
Please use the following tutorial to get yourself started:
The tutorial video below also looks helpful:
From what I see, the blocks that you may need include (but are not limited to): Gain, Sum, Integrator, and Transfer Fcn. There are also multiple ways implementing the same system in Simulink. Please first use the above tutorials to get yourself familiar with the Simulink environment.