The Purpose of this Research is to Investigate the Use of Blockchain Technology to Improve the Security of Organizational Information Systems. This Research is Applied and Descriptive, and the Statistical Population Consists of 118 Senior Managers in Companies Active in the Field of Information Technology. The Sample Size Was Estimated Through the Krejci-Morgan Table and 92 People Were Selected by Simple Random Sampling. The Research Data Was Collected Through a Questionnaire. Data Analysis Was Done Using Structural Equation Modeling With Partial Least Squares Approach and Smart PLS and SPSS Software.The Research Results Show That the Use of Blockchain Technology has a Positive and Significant Effect on Improving the Security of Organizational Information Systems. Also, According to the Obtained Results, Blockchain Decentralization, Blockchain Transparency and Non-Interference in Blockchain Also Have a Positive and Significant Effect on Improving the Security of Organizational Information Systems. The Evolution and Development of Computer Science Led to the Emergence of Computer Networks, Which Laid the Foundation for the Creation of Extensive Related Sciences, and Finally, These Developments Led to the Creation of New Communication Ideas.