Saddle for minitype portal processing center

The invention discloses a saddle for a minitype portal processing center. The saddle comprises an L-shaped backing part and a saddle bottom plate, wherein bottom plate linear guide rail sliding blockmounting positions and lead screw group mounting positions are arranged on the back side of the saddle bottom plate; a plurality of backing part linear guide rail sliding block mounting positions which are arranged in the horizontal direction are arranged on the bottom surface of the backing part; a corresponding clamping slot is formed between every two adjacent backing part linear guide rail sliding block mounting positions; the front side of the saddle bottom plate is provided with two protective plates; main shaft assembly side surface linear guide rail sliding block mounting postiions arearranged on the inner sides of the two protective plates; a main shaft assembly back side linear guide rail sliding block mounting position is arranged on the front side of the saddle bottom plate; avertical second clamping s