In The Elder Scrolls 5: Skyrim, how to improve the block in The Elder Scrolls 5 can be referenced as follows:
Experience in blocking skills is gained by successfully slamming or by negating damage with a shield or weapon. You need to prepare healing magic in one hand, hold a shield in the other, and then find a monster to hit you. It should be noted that the stronger the monster's ability, the faster your blocking skills will improve.