Abstract: Low temperature PECVD method was employed for in-situ preparation of CNTs reinforced TiNi composite brazing powder on Ni-TiH2 base material,in order to solve the problems such as poor dispersity of CNTs,poor structural integrity and reaction of C and Ti. The composite brazing powder was characterized by XRD,SEM,Raman and TEM. Analysis shows that the low temperature PECVD method has not only guaranteed the structural integrity and uniform dispersity of CNTs,but also inhibited the decomposition of TiH2 at high temperatures and further inhibited the reaction between C and Ti,which realized the reinforcement of CNTs to TiNi brazing powder. The reinforcement of CNTs could release the residual stress in brazed joints, improve the properties of the joints and further achieve the reliable joining and high-temperature application of ceramic,composites and metal.