Carbon nanotubes are thought-about as a promising materials for the event of excessive efficiency concrete. As a way to research the consequences of Multi walled carbon nanotubes (MWCNTs) content material, water cement ratio and addition methodology on the mechanical properties and microstructure of cement-based composites, specimens with MWCNTs content material of 0%, 0.05%, 0.08%, 0.10%, 0.15%, 0.20%, and 0.30% have been ready when the water cement ratio was 0.25, 0.3, 0.35, and 0.4, respectively. The bodily properties, mechanical properties and microstructure have been examined. The check outcomes present that with the rise of MWCNTs content material, the flexural power and compressive power of cement-based composites improve first after which lower. The DIC check exhibits that the displacement and pressure of the specimen with MWCNTs are smaller than the clean pattern underneath the identical concentrated load, whereas it’s reverse earlier than the failure of pattern. The SEM check exhibits that MWCNTs play the position of bridging and filling within the matrix. The EDS evaluation outcomes present that the 5 major parts of carbon, oxygen, aluminum, silicon, and calcium within the composite are evenly distributed within the cement matrix.