A brake-adjusting assembly for a fishing reel with a spool and has a first brake-adjusting device and a second brake-adjusting device. The first brake-adjusting device is mounted around a spindle of the spool and has a clutch cam and a lever mount. The clutch cam has a main plate body, a mounting tube, a spring and an abutting base formed on and protruding from the main plate body. The lever mount abuts with the clutch cam and has two pushing blocks, a mounting recess and at least one lever. The second brake-adjusting device is connected to the first brake-adjusting device and the spindle and has a connecting mount, a threaded tube and an adjusting switch. The connecting mount is mounted in the mounting recess. The threaded tube is mounted in the connecting mount to screw with the spindle. The adjusting switch is securely connected to the connecting mount.