Abstract: A titanium alloy spherical pressure hull with the diameter of 2 m and working depth of 4 km is taken as the design object. Shape functions of goose eggshell, chicken eggshell and ostrich eggshell are described by Narushin (N-R) equation. The bionic pressure hulls are designed by the method of equal volume and equal maximum stress level, and the dry mode and wet mode of each hull are analyzed by finite element method. Three dimensional hydroelasticity theory is used to calculate the far-field acoustic radiation of bionic egg-shaped pressure hulls. Results show that the egg-shaped pressure hulls excited at sharp point and blunt point have better acoustic radiation performance than spherical shell, and the goose egg-shaped shell has the best acoustic radiation performance at the frequency below 500 Hz. The acoustic radiation of spherical shell is much lower than that of the egg-shaped shell at the frequency above 500 Hz. The position of excitation has significant effect on acoustic radiation performance of egg-shaped pressure hull. Results can provide an effective guidance for the design and application of low noise bionic egg-shaped pressure hulls.