A stack array in a solid oxide fuel cell power generation system is provided. The stack array comprises a supporting body and a stack group, wherein the supporting body is in a layered structure and comprises one layer or at least two layers of supporting units; and on each layer of the supporting units, a plurality of stacks are sequentially arranged to form the stack group, and each stack is horizontal. The stack array is simple, compact and firm, and is favourable for system integration.
