In this paper, a kind of micro-nano magnetorheological elastomer (MRE), containing nano-Fe<sub>3</sub>O<sub>4</sub>, is prepared, and the normal mechanical property of micro-nano MRE is analyzed. Firstly, micro-nano MRE with different contents of nano-magnetic particles is prepared, and the microscopic static analysis is carried out by establishing a microscopic force model. Secondly, in order to investigate the normal mechanical properties of micro-nano MRE, an experimental platform is built, and its magnetic field flux is simulated by the finite element analysis software ANSYS. The results show that the maximum compressive elastic modulus of micro-nano MRE, containing 10% nano Fe<sub>3</sub>O<sub>4</sub> particles, is 2. 89 MPa, which is 149% of the traditional MRE under the same current. The normal stress of micro-nano MRE is significantly improved, which provides a new method for the development of high-performance MRE.