Suge Knight Sues Chris Brown ... It's Your Fault I Got Shot!

Suge Knight thinks Chris Brown's crappy security is the reason he got shot 7 times ... so now he's suing Brown.

According to the docs, Knight says Brown and 1 OAK Nightclub should have had better security in August 2014 when Suge was shot multiple times inside the club. He was hit in the abdomen, chest, and left forearm.

Suge, who's currently in jail awaiting trial for murder, calls out Brown in the suit ... for being a "known gang associate" with a history of hosting events where violent incidents happened.

He's also suing singer Pia Mia, who was co-hosting the party.

Knight claims since the shooting he's had major health complications ... including a blood clot.