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In order to meet the requirement of timing control in cold atom interference experiments, a laser timing control DDS system based on LABVIEW software is designed and realized. The working process is the frequency and frequency interval of the software input through LABVIEW. According to LABVIEW software to send control information to control the RF signal chip, CPLD chip to control the time interval between the RF signal, the final DDS chip and control information corresponding to the RF signal. Compared with the current similar devices, the system to achieve the frequency hopping time and frequency more accurate and better stability.After debugging and analysis of the system and performance testing, DDS frequency hopping system can meet the atomic interferometer laser timing control needs. Through the system debugging and performance testing, DDS frequency hopping system can meet the atomic time interferometer laser timing control needs. By testing the DDS device, the DDS device can output an accurate output RF frequency value, and the RF frequency time interval can be accurate to microseconds. The DDS device can effectively control the laser timing of the cold atom interferometer. When the probing time is 120 ms and the repetition rate is 2.2 Hz, the gravity measurement sensitivity of the cold atomic gravimeter is .