MIPS architecture is an important member of RISC processor family, and it is mainly applied in embedded systems. With its performance improvement, the MIPS processor is gradually used in the field of high-performance servers. The Loongson-3 processor is a typical representative of the MIPS architecture. As a main feature of high-performance server, the multi-core architecture is indispensible. Meanwhile, virtualization technology is another important application for the server, however in recent years the technology rarely has success on the Loongson-3 processor. Combining virtualization technology and multi-core technology on the Loongson-3 processor has much more difficulties as the method to simulate the multi-core architecture is hard and collaborative mechanism among different cores is complex. This paper analyzes the multi-core architecture and communication mechanisms of the multi-core architecture Loongson-3 processor and introduces a virtualization method for the multi-core architecture Loongson-3 processor. It mainly discusses the overall design of virtualization method of the multi-core Loongson-3 processor, the simulation of Loongson-3 multi-core architecture and the virtual inter-processor interrupt communication in the virtual machine. Experimental results show that the presented method provides useful and efficient multi-core virtualization support for the Loongson-3 processor.