The invention belongs to the technical field of pig 
casting machines for continuously producing 
casting pigs, and in particular relates to an iron 
alloy grain 
casting machine, which consists of a 
chain type slope conveyor, a grain casting die, a 
slurry spraying mechanism, a 
water cooling mechanism, a shocking device, an iron 
alloy liquid pouring insulation chute, a finished grain casting product receiving hopper and an 
electric control device, wherein the 
chain type slope conveyer consists of a conveyor frame, a chain inclined rail, a conveyor driving device, a conveyor tensioning and rotating device, and an annular 
roller chain; the 
slurry spraying mechanism consists of a stirring device, a 
slurry spraying stirring tank, a slurry spraying tank, a 
coating slurry 
sprayer and a slurry return groove; the 
water cooling mechanism consists of a water 
sedimentation tank, a 
water cooling tank connected with the water 
sedimentation tank through a water connecting 
pipe, a cold water 
sprayer and a water return groove; and the shocking device consists of a shocking bracket, a shocking driving device, an eccentric block, a fixed pin roll, a connecting rod, a reciprocating rod, a guide sleeve, a spring and a contact. The iron 
alloy grain casting 
machine completes a series of work procedures such as pouring, cooling, demolding and collecting iron alloy grains at one time and reduces labor intensity and production cost.