Layered supporting method in pit-in-pit construction process

The invention discloses a layered supporting method in a pit-in-pit construction process in the technical field of pits-in-pit, comprising a pit-in-pit, side supporting baffles, reinforcing enclosing purlins and supporting rods, the side walls of the pit-in-pit are enclosed by the side supporting baffles, the side supporting baffles are reinforced and supported by the reinforcing enclosing purlins, and the reinforcing enclosing purlins are oppositely supported and propped by the supporting rods, so that the side walls of the pit-in-pit are supported and supported by the supporting rods. According to the method, it is ensured that the side supporting baffles are stably supported in the pit, effective supporting can be conducted on the wall of the soil layer of the pit in the pit which is being excavated through the side supporting baffles, the side supporting baffles can be continuously spliced, and therefore the pit in the pit is effectively supported, the flexible supporting mode of the stratum can cope with