Iron doped anatase nanoparticles were prepared by reverse microemulsion route. The sample was heat treated at 400 C. The synthesized nanocomposite was investigated by XRD, UV-Visible, SEM, and XRD data showed amorphous phase after gel drying and detected anatase and magnetite peaks after calcination. The photo catalytic property of obtained nano particles has been studied by Photodegradation of Methylene blue. The results showed high activity of photo catalytic degradation of Methylene blue with a constant rate of 3.7 *10-3. The reactive reverse microemulsion synthesis was applied in order to obtain iron doped anatase nano powder and structural and morphological properties were investigated. The reverse microemulsion process under the optimized condition proved to be reliable and controllable route for producing nanosized spherical particles. Based on XRD data and SEM, the size of particles was about 40-70 nm. The particles had a spherical shape and uniform size distribution. Synthesis particles were amorphous after drying. anatase phase have been formed after heat treatment.