Supporting leg and connecting assembly

The utility model belongs to the technical field of furniture hardware, and particularly discloses a supporting leg which comprises a connecting base and a supporting column, the connecting base comprises a mounting plate and a first connecting pipe arranged at the bottom of the mounting plate, a first through hole is formed in the mounting plate, and the first through hole is communicated with the first connecting pipe; one end of the supporting column is connected with an inner cavity of the first connecting pipe through a lifting structure, a first adjusting hole is formed in the end, close to the first through hole, of the supporting column, the supporting leg further comprises a base, a containing groove is formed in one end of the base, and the other end of the supporting column abuts against the groove bottom of the containing groove through a rotating ball. The first adjusting holes penetrate through the first through holes to adjust the first adjusting holes, so that one end of the supporting column