The invention discloses a device for recycling sand, stone and mud used in construction, comprising: a bracket; a tank body; a stone discharge mechanism, which includes a feed pipe, a first motor, a stone discharge plate, and an axis horizontally arranged on the tank The drum in the body is provided with a spiral guide plate; the transition mechanism includes a transition cylinder, a guide cylinder, and a material guide tube; a sand discharge mechanism, and the sand discharge mechanism includes a The inner side wall is rotatably connected to the turntable and eight right-angled trapezoidal partitions. The turntable is a conical structure whose side wall and bottom are netted and coaxial with the tank body; the slurry discharge mechanism, the slurry discharge The mechanism includes a drainage plate, a bottom plate, and four baffles, and the drainage plate is obliquely clamped in the tank body. The present invention effectively avoids the accumulation of waste materials in the tank by setting the stone discharging mechanism, the sand discharging mechanism and the slurry discharging mechanism, and improves the separation efficiency and quality of sand, stone and mud.