The utility model relates to the technical field of construction equipment, and provides a concrete mixer capable of improving feeding efficiency, which comprises a base. By means of the technical scheme, the motor driving force drives the rotating shaft, the discharging plate, the
rotating disc, the vertical plate, the fixing rod, the storage hopper, the
extrusion rod, the connecting block, the torsional spring rod, the sleeve, the connecting plate and other assemblies to be matched with one another, the motor arranged on the side face of the fixing plate is started to rotate, and therefore the rotating shaft fixed to the
tail end of the output shaft is driven to rotate; and meanwhile, a
rotating disc fixed to the circumferential face of the rotating shaft is driven to rotate, the
rotating disc rotates to drive an
extrusion rod fixed to the circumferential face to do
circular motion, the
extrusion rod moves to make contact with and be fixed to a contact plate to extrude the contact plate, and when the contact plate is extruded, a torsional spring rod rotating to the side face of a connecting block rotates; and manual feeding is not needed, so that the working efficiency is improved, and the problem of construction building equipment in the prior art is solved.