Equal channel angular pressing (ECAP) process is one of the most important methods for powder densification due to the presence of shear strain. In this research, fabrication, mechanical and physical properties of Al-CNT composite produced with the ECAP method was investigated. Carbon nanotubes (CNTs) are expected to be ideal reinforcements of composite materials used in aircraft and sports industries due to their high modulus and low density. Carbon nanotubes (CNTs) have high elastic modulus and high tensile strength, typically Young’s modulus of 1 TPa and tensile strength of 30 GPa . However, it is difficult to take advantage of these mechanical properties in practice due to their poor formability.The best way of application may be to use CNTs as the reinforcement in metallic materials. In fact, there have been several attempts to produce Al/CNTs composites using processes such as hot extrusion , hot press, plasma spray and ball-milling. However, all of these attempts required heating to attain dense packing so that a reaction of CNTs with the Al matrix inevitably occurred and thus aluminum carbides (Al4C3) were unintentionally produced. Since carbides are brittle, cracks are likely to be initiated when the composite is deformed The non agglomerated CNTs were distributed homogenously with 2% consolidation in the Aluminum matrix. The ECAP process was performed o the both monolithic and composite samples for 8 passes. Scanning electron microscopy was utilized to investigate the size of porosities and the distributed CNTs in the powder Aluminum matrix. Transmission electron microscopy was utilized for more detailed investigation of sample microstructure after 8 passes. Relative Density differences of samples were obtained by the use of Archimedes methods. Hardness, pressure and shear punch tests were done to evaluate mechanical properties. The fracture surfaces of shear punched samples were studied by the scanning electron microscopy. In Aluminum samples, both ductile and brittle fracture were observed, but the brittle fracture was the only kind in the composite samples. MAUD software and Riet-Veld were used to analyze the XRD patterns and calculate the minor grains size, micro strain and dislocations density of monolithic and composite samples. In the composite samples, the grain size was reduced to 300nm and dislocations density was increased due to 8 passes of ECAP process. Transmission electron microscopy images showed that increasing the numbers of passes contributed to decrease of porosities and change of porosities shape from oval (elliptic) to spherical. By 2% consolidation addition of CNTs, relative density of composite samples was reduced from 99% to 98% in the eighth pass. In addition, hardness of composite sample was improved from 68HV to 82HV. Pressure strength of nano composite with the 2% consolidation CNTS in the eighth pass was reached to its maximum amount of 260MPa which was 20% more than aluminum samples in the same condition. Also, the amount of reduction for cross-sectional area from 23% in the aluminum sample was decreased to 17% in the composite sample. Furthermore, yang module was increased from 74GPa to 94GPa for the monolithic sample. Keywords: Equal channel angular pressing, Nano tubes, Ball mill attrition, Ultrasonic, Strength pressure, Dislocation density, Reduction of area.