How to interface between SIM5360 and ATMEGA2560 by UART
Sorry, everybody.
The reason was Arduino Code
After check circuit(POWKEY, RESET)

pinMode(FONA_RST, OUTPUT);
pinMode(FONA_KEY, OUTPUT);
digitalWrite(FONA_RST,LOW);
delay(20);
digitalWrite(FONA_KEY,LOW); 
delay(200);
Serial1.println("POWKEY lOW");
digitalWrite(FONA_KEY,HIGH);
delay(2000);
digitalWrite(FONA_KEY,LOW);
Serial1.println("POWKEY HIGH");
delay(1000);


Thank you for reading me.