Concrete is a useful product in construction and the advantage of it, is being accessible and low price and also important toreinforce. Ferrofluid Nano particles were synthesized by co-precipitation, and the CNT(Carbon Nanotube) was connectedto Ferro fluid in optimal PH and proper Temperature by surfactant. After the confection of the resultant material with concrete(56ppm) it was situated in magnetic field(2000gauss). Synthesised nano particles were analysed by SEM(scanning electronmicroscope) and the result showed aligned CNTs and the 56.48 size of ferrofluid. The armed concrete have been analysed withcompressive strength test by the circumstances of ASTM(No.C39-86). The results of the armed concrete, show 30% increase incompressive strength.