The invention relates to a method for low-strain upgoing wave detection of integrity of a transmission tower infrastructure and belongs to the technical field of quality inspection of power transmission and transformation engineering and civil engineering. The method includes striking the top surface of a to-be-tested transmission tower infrastructure through a tapping mechanism, so that a stresswave acceleration signal is formed inside the to-be-tested transmission tower infrastructure; acquiring stress wave acceleration signals of different heights on the side wall of the to-be-tested transmission tower infrastructure in the same tapping process, and repeating the operation many times; integrating the stress wave acceleration signals to obtain speed signals of stress saves; processing the speed signals of the stress saves to obtain an upgoing stress wave speed curve; judging the integrity of the to-be-tested transmission tower infrastructure according to different characteristics ofthe upgoing stress wave speed curve, and obtaining a judgment conclusion, wherein the judgment conclusion includes complete, expanded diameter and necked microvoid. According to the detection method,non-destructive testing can be performed on the integrity of the transmission tower infrastructure.