n order to solve the problem of high labor intensity and low efficiency during the working practice of transporting fruits，fertilizers and pesticide in mountain orchard, the 7YG—45 type selfpropelled dualtrack orchard transport was developed, and the following key technical problems were mainly solved, such as the steel wire rope and a couple of driving wheels cooperated friction drive, the track holding and disc braking cooperated braking, anti-side slipping and antijumping, anti rope rising and anti rope straightening during the rail curves, trailer’s slope adaptive adjustment, etc. The experimental results indicated that, the transport machine could run smoothly on the paved tracks, with the maximum climbing slope of 47°, minimum horizontal turning radius of 8m, the average speed of 1.0m/s. The transport machine could not only be used in the mountain orchard to transport the fruits and fertilizers, but also be equipped with spraying operations, cutting operations, or other operations. 