Checked... where? I managed to find 链接 to Repo Man (which was the latest episode).
But, to answer your question, as of right now, the 显示 isn't cancelled. It hasn't been renewed for an eighth season, but the CW says it's relatively safe.
The last episode was Repo Man aired on 17th Feb. After that all the CW shows are having a season break. So after the break ends, the 下一个 epi of 邪恶力量 will telecast on 16th March... Till then we've to wait and countdown!! ;)