为了分析地震信号瞬时频率的特征，本文重点论述了3种地震信号瞬时频率的计算方法（Hilbert变换、小波变换、Hilbert-Huang变换），并通过对比3种计算方法求取地震信号瞬时频率，分析得到了不同计算方法在提取地震信号瞬时频率过程中的的优势或缺陷，从而根据地震瞬时属性资料，获得更加可靠的地下构造和地质异常体信息。结果表明，在3种地震信号瞬时频率计算方法中Hilbert-Huang变换是计算地震信号瞬时频率最有效的一种方法，能够将任何地震信号分解为几个固有模式信号，从而赋予了瞬时频率合理的意义，同时兼顾信号的希尔伯特瞬时特性，较好的完成瞬时频率的分析。

 In order to analyze the characteristics of instantaneous frequency of seismic signals, this paper focused on three kinds of calculation methods of instantaneous frequency of seismic signals ( Hilbert transform, wavelet transform, Hilbert-Huang transform ), and obtained the instantaneous frequency of seismic signals by comparing the three calculation methods. And the advantages or disadvantages of different calculation methods in the process of extracting the instantaneous frequency of seismic signals were analyzed, so as to obtain more reliable information of underground structures and geological anomalies according to the seismic instantaneous attribute data. The results showed that the Hilbert-Huang transform was the most effective method to calculate the instantaneous frequency of seismic signals in the three methods of calculating the instantaneous frequency of seismic signals. It could decompose any seismic signal into several intrinsic mode signals, thus giving a reasonable meaning to the instantaneous frequency. At the same time, the Hilbert instantaneous characteristic of the signal was considered, the analysis of the instantaneous frequency was relatively perfectly completed.