Fuente: Wipo "BigData" The invention relates to the technical field of big data analysis, and discloses a tunnel monitoring system based on big data analysis, which comprises the following steps: constructing a tunnel safety monitoring evaluation index system; acquiring index data according to the constructed tunnel safety monitoring evaluation index system, and performing error correction processing on the acquired index data to obtain corrected index data; preprocessing the corrected index data, and calculating an index weight; and calculating a tunnel safety risk coefficient according to the index weight and the corrected index data, and if the calculated tunnel safety risk coefficient is greater than a preset risk threshold, indicating that the tunnel has a risk. The tunnel monitoring system based on big data analysis is utilized to obtain tunnel measurement data in real time, and whether the tunnel has the safety risk at present is judged in real time.