The invention discloses a full-automatic brick cutting machine. The machine mainly comprises a machine frame, a longitudinal material sawing mechanism and a transverse material sawing mechanism, wherein the longitudinal material sawing mechanism mainly comprises a longitudinal driving motor, a longitudinal band saw, paired longitudinal belt wheels, a material retaining plate and a material longitudinal travel control device, and the transverse material sawing mechanism mainly comprises a transverse material sawing frame, a transverse rail, a transverse driving oil cylinder, paired transverse belt wheels, a transverse driving motor, a transverse band saw and paired transverse travel control probes. The machine has the advantage that by integrating material collecting, material conveying, material preparing, material pushing, longitudinal material sawing, transverse material sawing, material discharging, material removal and material stacking, the full-automatic operation is realized, the watching operation by special persons is not needed, the working efficiency is greatly improved, the quantity of cutting wastes is greatly reduced, and the cutting size is easily controlled.