Uneven frame around any object after chroma key

Normally that means you need to play with the chromakey filter values to dial in the keying effect. Your screen is also a very light/pale green instead of a standard highly saturated green, which may make pulling a clean key difficult.
 
Thanks @FerretBomb, But I play with every option available the green is extremely saturated. I watch a lot of tutorial, But the uneven line around my body nenver seeen it in any tutorial. It's affect the final quality especially above my hair
 
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