The invention discloses a residue squeezing water tank. A squeezing cavity is connected at the bottom of a notch; a squeezing screw rod driven by a motor is arranged in the cavity; a water discharge pipe and a filtering screen are arranged at the bottom of the screw rod; a slag discharging opening formed in the tail end of the screw rod is connected with a slag discharging pipe; a motor control key is arranged on the surface of the water tank. The screw rod is driven through the motor, so that the food realizes the solid-liquid separation; the liquid is directly discharged through the water discharge pipe; solid containing no water or little water is discharged out through the slag discharging pipe. Through a pulling sheet, the condition that precious articles cannot be taken out in time after falling into the notch is avoided. Through the slow rotation of the screw rod, the solid-liquid separation is realized; the sound is small; the separation effect is good; no noise is generated; partial separated solid food can be used for feeding pets; high and wide applicability is realized.