A male pedestrian is fighting for his life after a giant icicle fell down seemingly out of nowhere and struck him on the head, causing him to pass out on the pavement.

CCTV footage captured the moment the man, who was not named, walked past a tall building in Qitaihe, Heilongjiang Province, northern China on the afternoon of November 14.

Seemingly distracted after a long day of work, he apparently did not notice the ice on the eaves had begun to melt and fall apart.

Suddenly a huge icicle became detached and dropped down, hitting the unsuspecting pedestrian on the head as he was trying to move past three women.

He collapsed on the snowy pavement and fell unconscious. The three women who saw him fall immediately moved away and sought refuge beneath a nearby tree.

Another passerby also rushed aside to avoid the dangerous ice.

Paramedics arrived at the scene and transported the man to hospital.

The injury reportedly caused him to lose a lot of blood and his prognosis is currently uncertain.

Police said the accident site has currently been cordoned off to prevent any other incidents.

City workers are currently clearing out the remaining icicles from the rooftop to make it safe again.