Popularity of Internet applications has led to the rapid growth of Internet traffic, which brings great challenges for Network operators, and the performance and scalability of traditional flow monitor system cannot meet the needs of operators. Based on the campus network traffic monitoring, this paper attempts to combine many-core technology with Spark, and presents a high-speed traffic monitor system. Many-core processor part is responsible for high-speed traffic collection, processing and log generation; Spark platform handles the distributed storage of large amounts of log data and its high-speed parallel processing. Web Server is used for data visualization. The DNS traffic of the campus network is taken as the object of monitoring, which verifies the feasibility and extensibility of the system.