Small mixer, also known as mixing robot or portable mixer, is a kind of mixing equipment used for sand, concrete or other dry materials, semi-fluid materials. It is characterized by light weight, small size, labor saving, high efficiency, multi-function, easy to carry and strong adaptability. The core of the small mixer is a mixing head with multiple interactive mixing blades. The mixing head can be directly placed on the ground for high-speed rotation. At the same time, equipment can be controlled by hand to move 360 degrees at any Angle and distance, so as to realize three-dimensional high-speed three-dimensional mixing. The small mixer is different from the traditional mixer in another big feature: the small mixer can use battery power, can achieve long time continuous operation in the field in the absence of a generator. Unique design with energy-saving motor to greatly reduce the overall energy consumption of the equipment, without the use of 220V power access,greatly improve the convenience and adaptability of the equipment.