The invention relates to a CORDIC (coordinate rotation digital computer) accelerator based on parallel pipeline design. The CORDIC accelerator comprises an angle pretreatment module, a CORDIC kernel module, a data rear end treatment module and a controller module. According to the invention, relevant data signals and control signals are read into the controller module by a control line; then the to-be-solved angle is transmitted to the angle pretreatment module; then the treated angle and the initial value which is read in from the controller module are transmitted to the CORDIC kernel module together, wherein the CORDIC kernel module adopts a parallel 16-level pipeline structure; the two values including the sine and the cosine of the angle after being treated by the angle pretreatment are calculated rapidly; then the calculated data and phase control signals output from the controller module are transmitted to the rear end data treatment module together; the plus or the minus of the value of the sine and the cosine corresponding to the initial phase are determined; and finally the sine value and the cosine value are transmitted to the controller module, and relevant results are given according to the required sine value or the cosine value required by the external control signal.