The invention discloses a reaction device capable of stirring and removing impurities conveniently. The reaction device comprises a tank body and a cutting fluid stirring paddle which is positioned in the tank body and comprises a stirring shaft and stirring blades; three layers of stirring blades are sequentially arranged from the upper part to the lower part of the stirring shaft; the stirring shaft comprises a hollow dual-layer shaft body; the stirring blades are hollow dual-layer blades; one ends of the hollow dual-layer blades are communicated with the inner part of the hollow dual-layer shaft body, and the other ends of the hollow dual-layer blades are radially arranged at the outer periphery of the stirring shaft; the hollow dual-layer shaft body of the stirring shaft is internally provided with first filtering screens; the hollow dual-layer blades of the stirring blades are internally provided with second filtering screens; the tank body is also provided with a recycling pipe; the recycling pipe is internally provided with a recycling pump. According to the device, the problems of complex procedures and low efficiency when an existing cutting fluid is stirred and then filtered again are overcome, and the invention provides the reaction device capable of stirring and removing the impurities conveniently, which can be used for filtering while being used for stirring, is simple in procedure and is high in efficiency.