Telescopic supporting leg

A telescopic supporting leg comprises a cylinder body, a supporting leg body, an extension end input module, a lifting end input module, a top block, a supporting plate, a bottom plate, a sealing block, a left cavity, a lifting cavity and a pressing cavity. Wherein the extension end input module comprises an extension input pipe, and the lifting end input module comprises a lifting input pipe and a connecting box; a lifting input port and an extension input port are formed in the cylinder body; each supporting leg comprises a piston plate, an I-shaped leg, a positioning block and an inner cavity; the lower ends of the supporting legs are connected with wheels, the I-shaped legs comprise I-shaped sections and can stretch out and draw back in the cylinder body, the lower ends of the I-shaped legs stretch out of the cylinder body, and the piston plates are arranged at the upper ends of the I-shaped legs. 一种伸缩支腿，包括缸体、支腿、伸长端输入模块、抬升端输入模块、顶块、支撑板、底板、密封块、左腔、抬升腔、下压腔；其中所述伸长端输入模块包括伸长输入管，所述抬升端输入模块包括抬升输入管、连接盒；所述缸体上设有抬升输入口、