The triple-foil target irradiated by the counter-propagate(C-P) laser has been proposed to enhance the laser to X-ray conversion efficiency (CE). Through one-dimensional radiation hydrodynamic simulation, it is found that the total X-ray CE for the triple-foil target with C-P laser has a 61% radiation energy fraction. It is a 6% improvement compared to the double-foil target and a 17% improvement to the standard target. It has been shown that the increased X-ray emission is mainly concentrated in the soft X-ray region, which is caused by the broad radiation region and reduces the development of the ion kinetic energy. Additionally, the target geometric parameters have been discussed for finding the best laser to Xray CE with the detailed analysis of the plasma's hydrodynamic evolution.