The invention relates to the technical field of well drilling, and discloses a method for analyzing the overflow leakage early-warning trend during trip-out operation and trip-in operation of well drilling. Through the method, a novel method for analyzing the overflow leakage trend through mud variable quantity is provided, that is, on the one hand, related influence factors in the well drilling construction process are comprehensively surveyed, on the other hand, by applying an advanced computer technology and an intelligent algorithm and by applying an original fuzzy mathematical processingmethod and a trend analysis algorithm, the mud overflow leakage trend during trip-out and trip-in of well drilling can be quickly identified after the grouting amount or the liquid drainage amount ofeach drilling rod is obtained recently, the original cognitive limitation is broken through, the problems of complex, slow and untimely computation of current overflow monitoring early-warning are solved, the industry gap can be filled, the novel monitoring method and means are provided for existing well-drilling construction safety, and the international leading level is achieved.