The utility model discloses a high resolution signal generator based on DDS. The integration has microprocessor, PLL clock, singlechip expansion interface, memory ROM and DDS subassembly module in the FPGA module, FLASH memory and SDRAM memory all are used for saving incoming signal to the incoming signal's that obtains after handling DDS subassembly module output data stocks memory ROM in, reads the data in the function ROM table among the from the memory ROM, obtains wave form signal output with data transmission to DAC conversion module after the processing. The utility model discloses an integrated DDS subassembly, singlechip expansion interface and PLL obtain higher frequency resolution, the frequency bandwidth of broad on FPGA's piece, improve the stability of wave form frequency, realize the output of broadband sweep signal, have phase noise and hang down that spurious suppression is good, the frequency hopping is fast, a singlechip is as control device for inserting different control types for this signal generator has high exploration.