Colored toner and method for preparing the same

A colored toner and its preparation method thereof. The method includes: 1) providing surface-treated colorant, polymerizing the colorant by atom transfer radical polymerization (ATRP) to produce polymer-grafted colorant particles and dispersing the colorant particles in an aqueous solution including a surfactant to yield a first emulsion; 2) providing surface-treated wax, polymerizing the wax by ATRP to produce polymer-grafted wax particles, and dispersing the wax particles in the aqueous solution including the surfactant to yield a second emulsion; and 3) agglutinating the first emulsion and the second emulsion. The colored toner has simple technology, good reliability, stable performance, good developing density, high charge-mass ratio of toner, narrower distribution of charge-mass ratio of toner, low gray background and waste powder rates in printing, lower consumption and higher resolution.