A double crawler transport vehicle in mountain orchard with non-rigid chassis and dual-hub driven motor was designed to solve the problems of the large orchard slope in the mountainous region,the row spacing and spacing of the fruit trees planted is small,the site conditions are poor,the operation environment is complex,the transportation volume of fruits,agricultural resources,and sprays are large,and the small transportation vehicles have difficulties in turning and passing through the mountain orchards with poor peace and harmony.The outline dimension of transporter designed is 2 150 mm×1 040 mm×1 100 mm.It uses chariot chassis as driving mechanism and has dual-wheel hub motor with independent drive and chain drive.Three-dimensional modeling was constructed with the software SolidWorks and the virtual prototype model.The high-platform trenches simulation terrain were created by SolidWorks.The high-platform and trenched obstacle of the transport vehicle’s chassis were simulated with software ADAMS.The maximum vehicle speed,minimum turning radius,maximum climbing degree and the energy consumption of the vehicle were tested and analyzed.The results showed that the absolute error of longitudinal displacement of the centroid position was within ±5% and the absolute error of lateral displacement of the centroid position was within ±3% during the process of overpassing the platform and the trench.The designed transport vehicle had a maximum load of 250 kg,a maximum climbing degree of 20° and a maximum speed of 1.8 m/s,the minimum turning radius is 0.7 m.Its ability to overcome obstacles is stronger,and its adaptability to mountain orchards with complex terrain,poor road conditions and even no roads is better,and it can better meet the transportation requirements of mountain orchards.