The invention provides a device and method for generating a sine wave. The device comprises a phase accumulation module, a value searching module, an interpolation module, a random bit cutting module and a sine wave generating module. The phase accumulation module is used for obtaining configuration information of the sine wave and generates address information of the sine wave according to the configuration information, wherein the address information comprises integer address information and decimal fraction address information, the value searching module is used for searching for first data information and second data information of the sine wave according to the integer address information, the interpolation module is used for conducting interpolation between the first data information and the second data information according to the decimal fraction address information and obtains interpolation original data information of the sine wave according to the decimal fraction address information, the random bit cutting module is used for conducting bit cutting processing on the interpolation original data according to the bit width of the decimal fraction address information and pseudorandom sequence output values to obtain the final interpolation data information of the sine wave, and the sine wave generating module is used for generating image information of the sine wave. According to the device, a digital circuit with the smaller area is utilized, and the sine wave with the richer and more accurate frequency can be generated.