Contact channel supporting system frame for advanced excavation

The utility model belongs to the field of supporting frames, particularly relates to a connecting channel supporting system frame for advanced excavation, and aims to solve the problems that drips at the top of a tunnel cannot be treated during use of an existing connecting channel supporting system frame; in order to solve the problems that in the prior art, the span cannot be adjusted, and the flexibility is low, the following scheme is provided, the device comprises two bottom plates, a plurality of steel frames are arranged between the two bottom plates, and waterproof cloth is laid on the tops of the steel frames; the top of the bottom plate is provided with a slide way, the steel frame is connected in the slide way in a sliding mode, the bottom of the bottom plate is provided with a water collecting tank, and a plurality of water leakage holes are formed between the water collecting tank and the slide way. And meanwhile, when the span of the tunnel is large, the distance between the two bent rods is adj