Generally,the squeezing casting is only employed for the castings whose height-diameter ratio is less than 3.5.Researching the castings with high height-diameter ratio in squeezing casting can extend the applicable scopes of the advanced casting technology.The mechanical properties of the ZA27 alloy with the high height-diameter ratio of 7 and distribution of temperature,pressure and shrinkage porosity during solidification process were investigated by experiment and numerical simulation.It is revealed that the shrinkage porosity in the castings with high height-diameter ratio can be obviously reduced with the increase of the pressure.Through rationally controlling pouring temperature,preheated temperature for mould and temperature distribution of the cast mould,the shrinkage porosity in the castings can be eliminated to obtain the castings with high and even mechanical properties.