The invention relates to an L-shaped outer spherical surface aligning bearing seat with a safety protection cover. The bearing seat comprises a seat body and a safety protection cover, wherein the seat body is provided with a bearing installation port, the safety protection cover comprises a cup-shaped mesh shade and a fixed bracket, a serriform ratchet is welded on the outer wall of the cup-shaped mesh shade, symmetrical steps are formed on the back surface of the serriform ratchet, and the serriform ratchet and the outer wall of the cup-shaped mesh shade are welded into a whole to form two symmetrical straight grooves; and the fixed bracket is formed by a fixed part and a connection part which are installed to form a right angle manner, the connection part is provided with a C-shaped groove, two arms of the C-shaped groove are respectively buckled in the straight grooves, and the fixed part is provided with an elongated groove. The bearing seat provided by the invention is subjected to safety protection, so as to improve the protection measures on the safety production.