Energy-saving and environment-friendly vertical concrete mixer

The invention discloses an energy-saving and environment-friendly vertical concrete mixer, and relates to the technical field of concrete mixing equipment, the energy-saving and environment-friendly vertical concrete mixer comprises a rack and a mixing tank fixedly arranged on the rack, the top wall of the mixing tank is provided with a feed port, and the bottom wall of the mixing tank is provided with a discharge port; a discharge port is formed in the stirring tank, a sealing cover for sealing the discharge port is arranged at the discharge port, a stirring shaft is rotationally arranged in the stirring tank, a mounting sleeve is slidably arranged on the stirring shaft in the length direction of the stirring shaft in a sleeving manner, and a propeller blade is fixedly arranged on the mounting sleeve; a first driving assembly for driving the mounting sleeve to slide is arranged on the stirring shaft, and a first driving source for driving the stirring shaft to rotate clockwise or anticlockwise is arranged on