Lifting device for convertible barrier-free escalator steps

The invention provides a lifting device for steps of a conversion type barrier-free escalator. The lifting device comprises a lifting mechanism, and a first adjusting mechanism and a second adjusting mechanism are arranged on the two sides of the top of the lifting mechanism correspondingly; the lifting mechanism comprises a bearing part, a lifting part is arranged on the bearing part, the first adjusting mechanism comprises a first driving part and a first transmission part which are arranged on the lifting part, the first driving part is connected with the first transmission part, and the second adjusting mechanism comprises a second driving part and a second transmission part which are arranged on the lifting part. The lifting mechanism is arranged, the lifting part in the lifting mechanism can achieve the lifting function, the first driving part in the first adjusting mechanism can drive the first transmission part to move horizontally, and therefore corresponding position adjustment can be conducted acco