The invention discloses an adjustable stirring machine which comprises a motor device and a stirring device; conventional high speed rotating blade type stirring is changed into revolution stirring piece type low speed stirring; no rotary center rotating shaft is arranged at the part, immersed into liquid, of the adjustable stirring machine, so that the phenomenon that the polymer 'climbs rods' in the stirring process is avoided, the stirring effect is relatively completed, and viscosity loss of the polymer solution caused by mechanical shearing of high speed rotation of a blade stirring machine can be effectively reduced.