Port engineering is characterized by a large number of electrical equipment，large power consumption，large-scale power supply facilities and complex systems. In overseas projects，if traditional civil substations are used，the installation of electrical equipment is restricted by the progress of civil construction，and the installation and commissioning cycle of equipment on site is long，which is detrimental to the overall construction progress. This paper compares the construction period，quality assurance，floor space，and investment of E-House and concrete substations，and concludes that“the E-House program is more advantageous in overseas port construction”. The electrical design，structural design，dust-proof and anti-corrosion measures of E-House are expounded，which can provide reference for the design of similar projects.