Question

if we take different blood group then we die but what about the mosquito he doesn't die after taking different blood group

Answer 1

because our blood is it's food as we eat different type we can't die as like in the case of mosquito

Answer 2

Mosquitoes do not actually consume blood.
As you are aware that only FEMALE mosquitoes suck blood, they make use of the iron and protein of our blood and use it to produce eggs.
Since the dont really feed on blood, they do not die and their bodies are not structured the way our bodies are.