Synchronous grouting device and grouting method for recycling shield muck

The invention discloses a synchronous grouting device and method for recycling shield muck, and relates to the technical field of shield tunnel construction, the synchronous grouting device comprises a feeding tank, a stirring mechanism, a screening mechanism and a storage mechanism, the stirring mechanism comprises a stirring tank and a stirrer, the stirring tank is connected with the feeding tank and the screening mechanism, the stirrer is installed in the stirring tank, and the screening mechanism is installed in the stirring tank; the bottom of the stirring tank is communicated with the storage mechanism through a conveying pipe. The screening mechanism comprises a supporting frame, a first feeding port, an upper vibrating mechanism and a lower vibrating mechanism, the first feeding port, the upper vibrating mechanism and the lower vibrating mechanism are sequentially arranged from top to bottom, a residue storage tank and a waste residue tank are arranged below the lower vibrating mechanism, screened res