To solve the main problems of widespread real-time continuous monitoring such as large real time data volume, a network structure of single sink node parallel receiving packages from multiple channels is put forward and the multi-channel sink node is designed. In the sink node design, FPGA is the core processing chip which controls RF modules parallel working in different channels concurrently. FPGA also controls USB20 bus transmitting the sequential sampling data which is processed in turn through the cache to monitoring center real-timely, and the widespread real-time monitoring of wireless sensor network is realized. The function of multi-channel sink node is verified by building real-time continuous monitoring system of clustering wireless sensor network.