The layered transition metal oxides NaxMO2 (M=transition metals) is one of the most important of cathode materials for room-temperature sodium ion batteries. According to different ways of the stacking of the oxygen arrangement, these oxides are categorized into two groups mainly (i.e., O3 and P2). In the matter of electrochemical property, P2-type materials show excellent cycle performance and rate capability, but the Na+/vacancy ordering limit the Na ion transport kinetics and cycle performance. Here we hope to study the crystal structure of P2-type NazNi1-x-yTixMyO2 (M=Co, Mn;z=0.6-0.8) by neutron powder diffraction combined with X-ray diffraction at different temperature, to determine the relation of more than two transition metals and Na+/vacancy ordering for this kind of compounds, and to analyze the effects of crystal structure and transition metal substitution on electrochemical property.