Data collector is an important flight-test instrument;its character will greatly affect the flight test of modern aircraft.To fill the requirement of finalizing the design of the modern aircraft,a large number of FPGA and DSP components have been used in the design of new generation data collector,which will greatly increase the sampling rate,channel number and parameter type,and improve the flexibility of usage.This paper describes the design technique of analog quantity acquisition card in the new generation collector and gives the theoretical support of its design.The digital signal processing technique is used to magnify the signal,filter and correct the offset.