At Currently, manganese oxide nanoparticles (MnO2 NPs) have intrigued material science researches XRD widely owing to its extensive variety of applications. In view of the study, the manganeseoxide nanomaterials were prepared via using manganese chloride Tetra hydrates salts. This samples were considered to novelty the structural, functional andmagnetic properties by XRD, VSM, and UV correspondingly. An attempt is finishedtowardreview thecomplete field dependent magnetization study of the synthesized material is presented. Structural studies by XRDindicate that the synthesized material as tetragonal crystal structure. The Antiferro magnetic behavior was detected at room temperature with no saturation magnetization and hysteresis in the region of measured field strength. These dimensions as a role of temperature and field strength showed a reduction in Anferromagnetic temperature.The UV exhibits theprepared manganese oxide were nanoparticles in the wave number ranges of 391.73cm-1