本文介绍了230MHz—300MHz数字式太阳米波声光频谱仪的工作原理和利用光电二极管阵和计算机数据处理新技术。该频谱仪由10m抛物面天线,PbMoO_4声光偏转系统,1024通道光电二极管阵列以及微机组成。天线的接收频率为230MHz—300MHz,并采用超外差式接收机进行变频。该频谱仪的带宽为70MHz,谱分辨率为250kHz,时间分辨率为80ms,接收机噪声系数为6dB。利用本频谱仪已得到大量的太阳米波爆发天文数据。 This paper introduces the working principle of 230MHz-300MHz digital solar rice acousto-optic spectrometer and the new technology of using photodiode array and computer data processing. The spectrum analyzer consists of a 10m parabolic antenna, a PbMoO_4 acousto-optical deflection system, a 1024-channel photodiode array, and a microcomputer. The receiving frequency of the antenna is 230MHz-300MHz, and adopt superheterodyne receiver to carry on the frequency conversion. The spectrum analyzer bandwidth of 70MHz, spectral resolution of 250kHz, the time resolution of 80ms, the receiver noise figure of 6dB. The use of this spectrum analyzer has been a large number of outbreaks of solar rice wave astronomical data.