Active template process was successfully used to prepare nano nickel powder. The influences of different technology conditions on the properties of the nano nickel particles were investigated. Laser Granularity Instrument, XRD and TEM were used to analyze the properties of the samples respectively. The action mechanism of active template was also discussed. The results show that active template not only has micro-reactor action and steric stabilization function, but also acts as reducer during reaction. The nano nickel powder via active template process take on regular sphericity-chain morphology without obvious agglomeration and has fine particle size(45.7 nm) and narrow distribution(16.0 nm~59.1 nm).