In this paper, the authors report a novel design of a 2-directional micro rotational motor (MRM) driven by four V-shaped electrothermal actuators. Rotation of an outer rotor ring is achieved by conversion of reciprocating movement of the V-shaped actuators, which are arranged in the couple so that they are capable of generating a driving moment while working. By using two couples of the driving actuators and the other two braking actuators, the motor can rotate 2-directionally. Theoretical calculation of displacements and forces shows that the motor can produce a relatively large displacement with low driving voltage. Simulation in Ansys has also been carried out, and the simulated results matched well with the calculated ones. Acquired results point out that the proposed model is ready for the next steps - fabrication and test of the micro rotational motor.