Sliding support

The utility model discloses a sliding support which comprises a support body, a high supporting leg set and a low supporting leg set, and the support body is used for supporting a sliding unit. The high supporting leg set is arranged at the bottom of the support body, used for bearing the support body to slide along the low-elevation sliding rail and comprises at least two first supporting legs and second supporting legs which are sequentially arranged in the sliding advancing direction. The low supporting leg set is arranged in front of the bottom of the support body relative to the high supporting leg set and comprises at least one third supporting leg which is used for abutting against the base face of the high-elevation sliding rail to be matched with the first supporting leg to bear the support body during elevation crossing. According to the sliding support, the process of jacking and unloading through a jack can be avoided, a low-elevation sliding track can stably stride the elevation to a high-elevati