Hello everyone can i know why my blynk easily lost connection when run please help me!

what network hardware and library? what sketch?

You need to be more specific (maybe post links) because

What is blynk? A product of some kind or just the Arduino blink sketch?

Connection, what connection? Jumper in breadboard connection? Serial monitor connection? Internet connection?

I am not a mind reader. I have a hat for that but the elves need to fix it and I can't find elves!

Blynk is a service provider. You can use their app to construct a UI on a phone using their widgets that instruct a micro controller and display data from it. The OP is likely experiencing connectivity problems between the Blynk servers and an Arduino (I assume).