My phone was restarting automatically

From few days my A7 was not working well it was restarting automatically anytime pls help me to fix this

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0