The invention relates to the technical field of water-
powder mixing or liquid mixing equipment in the construction operations of oil and gas fields and particularly relates to a fracturing base liquidmixer used in a construction process of an
oil field fracturing site. The fracturing base liquid mixer comprises a
rotational flow premixing device which comprises a liquid inlet, a feeding hole, a connecting component and an annulus, wherein the feeding hole is vertically formed, the liquid inlet is horizontally formed, the side wall of the feeding hole is connected with a sleeve, the connectingcomponent is arranged in the sleeve, the annulus is formed by the connecting component and the side wall of the feeding hole and is communicated with the liquid inlet, an oblique side is arranged atthe lower end part of the side wall of the feeding hole, an
oblique plane is arranged at the upper part of the connecting component, and the
oblique plane and the oblique side form certain angles witha
vertical plane and are 0-80 degrees; and a reduced section, a
throat pipe and a dispersion
pipe are sequentially arranged at the lower part of the feeding hole. The fracturing base liquid mixer canmeet the requirements on the fracturing base liquid during large-scale operations in a fracturing operation site, the blending and mixing efficiencies are improved, the mixing quality of
guanidine gum liquid is improved, and the optimal energy efficiency ratio is realized.