relaxed是形容词，指某人感到轻松、放松、不受拘束的，只能用来修饰人。relaxing也是形容词，指某事某物“令人”轻松的，只能用来修饰物或事。二者的用法存在比较一定的差别。
（1）He is feeling relaxed.
他感到很放松。
（2）She is relaxed.
她很放松。
（3）The song can make me relaxed.
这首歌能让我放松。
（4）I feel relaxed and peaceful.
我感到放松而平和。
（5）He was doing this to make me more relaxed.
他这么做是为了使我更放松。
relaxing的用法
（1）The song is relaxing.
这首歌真使人轻松。
（2）You can listen to relaxing music in the bath.
你甚至可以边洗澡边听（令人）轻松的音乐。
（3）I find cooking very relaxing.
我发现烹饪可以令人非常放松。
（4）You don't have to feel bad about relaxing.
你不必为放松感到内疚。
（5）I want to have a relaxing holiday.
我想有个轻松的假期。
