Abstract: To address the issues of high manual labor intensity and cost associated with the vine-dropping process of long-season cucumbers and tomatoes in greenhouse cultivation, an integrated vine-dropping device for vine crops in the greenhouse was designed. The structure and working principle of the integrated dropping vine device were described, and the system model was constructed. Based on the model and working characteristics of the integrated dropping vine device, an energy-saving method for balancing crops load vine with counterweight was proposed. The working performance of the device during the dropping process is analyzed under different motor rotation speeds of 286 r/min, 143 r/min, and 95 r/min, with a focus on balancing the load of cucumber vines using a counterweight. The test results showed that the motor rotation speed had slight fluctuations during low-speed operation, but the overall running effect was good. As the cucumber vines descended, the weight of the vines gradually became less than that of the counterweight, resulting in a gradual increase in the output torque of the motor under various working conditions. The working performance of the integrated dropping vine device was analyzed under dropping vine and lifting conditions when the motor rotation speed was 286 r/min. The results showed that the variation trend of motor output torque is similar for both dropping and lifting the vine using the counterweight method, with slightly higher torque observed during the dropping process. The average power consumption of the system during the dropping and lifting processes was 7.92 W and 5.54 W, respectively. The distribution characteristics of cucumber plant growth in an experimental greenhouse were tested and analyzed using an S-shaped method. The results showed that the integrated vine-dropping device had good applicability because the daily growth difference between the plants with the greatest growth and the smallest growth was only 0.35 cm.