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Aiming at the problem that the existing measuring device for anti-collapse characteristic of corn plants is unstable and not perpendicular to the plant, which results in large error of measuring results, a measuring device for anti-collapse characteristic of corn plants driven by motor was designed. The device can quickly measure the maximum moment that the corn stalk can withstand from erect to different angles of lodging. Based on the analysis of the stress on lodging of maize, the plant mechanical model was established and the index of anti-collapse characteristic was put forward. The test results showed that the deviation between the detection angle of the device and the actual angle was 1°, which met the detection requirements. The stability test of the loading speed of the device was carried out, and the results showed that the measuring angle of the designed device changed smoothly with time, which verified the stability of the loading speed of the device. Taking the maximum pushing moment and maximum pulling force as indexes, the field experiments on pushing and pulling lodging of different maize varieties and planting densities were carried out. The results showed that the correlation coefficients of maximum pushing moment and maximum tensile strength were -0.971 and -0.873, respectively at the density of 75000 plants/hm2. At the density of 105000 plants/hm2, the correlation coefficients of maximum pushing moment and maximum tensile strength were -0.991 and -0.927, respectively. The results showed that the maximum pushing moment was better than the maximum pulling force. Based on the field test, the reliability verification test of the device was further carried out with the maximum push-moment as the test index, and the test results were consistent with the existing research conclusions.