Effects of pulsed magnetic field on solidification structure and compressive performance of AZ31 alloy were investigated.Morphology of primary phase and grain size in the alloy with different pulsed voltage

pulsed frequency and mould temperature under the conditions of designed temperature were expounded.The results show that solidification structure of AZ31 alloy can be improved significantly by pulsed magnetic field treatment.With the increase of pulsed voltage（0

3

00 V）

or pulsed frequency（1

1

0 Hz）

primary phase in the alloy is degraded gradually from well-developed dendrites into fine equiaxed grains or rosette crystals.With mould temperature at 20

6

00℃

primary grain size is refined firstly and then coarsened.At 200 ℃

grain size presents desirable.Pulsed magnetic field can improve greatly compression performance of AZ31 alloy.With the pulsed voltage of 300 V

pulsed frequency of 5 Hz and pouring temperature of 720 ℃ as well as mould temperature of 200 ℃

the compressive stress of the AZ31 alloy reach 340.87 MPa.Compared with conventional casting

compressive stress and compressibility of the alloy are increased by up to 71.40% and 75.14%

respectively.