Effects of processing parameters on mechanical properties of squeezing casting ADC12 aluminum alloy connecting rod were investigated by universal materials testing machine and OM （optical microscope）.The results reveal that squeezing casting connecting rod exhibits acceptable surface quality and mechanical properties

and tensile strength and elongation reach up to 371 MPa and 7.1%

respectively.Mechanical properties of the connecting rod are obviously affected by squeezing casting parameters.The connecting rod with acceptable surface quality and mechanical properties can be obtained with preheating mould at 300 ℃ and pouring at 700℃

delaying for 8 s before pressurization and pressurizing for 322MPa.