The utility model relates to a wave form well logging data acquisition system. A real -time collection system of multichannel wave form log data high accuracy based on CPLD, is including the analog signal input unit, signal processing unit, signal storage cell and the outside PC host computer that connect gradually, analog signal input unit including the sensor and the one -stage size -expansion ware that connect gradually, signal processing unit including the filtering the control unit that sets gradually, program control gain adjustment unit and AD conversion the control unit, the one -stagesize -expansion ware is connected with filtering the control unit, still include main control unit, main control unit is connected respectively with filtering the control unit, program control gain adjustment unit, AD conversion the control unit and outside PC host computer. The utility model discloses a system function is clear and definite, and hardware circuit is succinct, and process design is reasonable in control, and the system is small, and it is convenient to remove, has the characteristic that multichannel, high accuracy and real -time data gathered, can extensively be used for fields such as wave form signal acquisition.