The invention provides a method and a device for bubble suppression. The method includes the following steps: determining a minimum phase wavelet in a work area to be detected according to multiple pieces of single-shot seismic data in the work area to be detected; cutting the minimum phase wavelet based on the time of bubble generation in the actual process of exploration to get a minimum phase wavelet after cutting; getting a bubble suppression operator in the work area to be detected through calculation according to the minimum phase wavelet after cutting; and using the bubble suppression operator to convolve each piece of seismic data to get seismic data after bubble compression. In the embodiment of the invention, the wavelet is obtained according to actual data, and the influence ofactual factors on the wavelet is fully considered. Therefore, the degree of bubble suppression can be improved, the bubble effect can be eliminated, the signal-to-noise ratio of data can be improved,and the resolution of offshore geological exploration can be improved.