Stackable escalator step assembly

The stackable escalator step assembly comprises at least two steps, each step comprises a pedal, a kick plate and a supporting frame, the supporting frame comprises a limiting structure, the limiting structure comprises a first limiting block and a second limiting block, a groove is formed in the first limiting block, and the second limiting block is arranged in the groove. And the second limiting block of one step can be inserted into the groove of the other step in a shape matching manner, so that stacking of the upper step and the lower step is realized. First protruding strips are arranged on the pedals, the step assemblies comprise isolation strips, the isolation strips are provided with second protruding strips, the second protruding strips are divided into two sets which are arranged on the two different sides of the isolation strips in the thickness direction, and each set of second protruding strips can be inserted into a gap between every two adjacent first protruding strips in a shape matching mode