Mobile Ad Hoc Networks (MANETs) operate without fixed infrastructures or a central access point. In MANET, the nodes are constantly moving at various speeds, resulting in unpredictable network topologies and path transmission. AODV, OLSR and BATMAN protocols are frequently used for route selection in MANET. In order to compare three routing protocols, three scenarios are created by changing the pause time, moving speed, and the number of nodes. Simulation results show that BATMAN, and OLSR perform well in networks with frequent changes in network topology, AODV has great advantages in fast mobile networks, and OLSR performs well in large-scale networks. Finally, according to the experimental results, the performance of the three protocols, such as packet delivery rate (PDR), end-to-end delay, and mean hops, is evaluated and analyzed.