Due to the serious threat of dyeing wastewater to human health and water environment, it is urgent to develop economical, efficient and convenient adsorbents for its treatment. In this work, the magnetic carboxymethyl chitosan microparticles (MCCs) were synthesized by the cross-linking reaction of carboxymethyl chitosan with glutaraldehyde and the magnetic nanoparticles, ferroferric oxide, was successfully packed. The analysis of infrared spectrum and magnetic hysteresis loops suggested that MCCs had a large number of active functional groups and good magnetic properties. The experimental results showed that the adsorption capacity of MCCs for crystal violet (CV) increased with higher pH in water, and it had a stable and efficient adsorption performance between pH 5.0-10.0. Adsorption isotherm and kinetic data of MCCs were well fitted by Langmuir isotherm and pseudo-second-order kinetic model, respectively. And the maximum adsorption capacity at pH 8.0, 25 ℃ was 942 and 1144 mg / g at 35 ℃. After 5 cycles of regeneration experiment, MCCs still maintained high adsorption capacity, which indicated they had superior performance of regeneration and reuse. MCCs have the advantages of low cost, high efficiency and environmental protection, hence they have great application potential in water treatment.