A safety surgeon knife structure comprising mainly a knife handle, a knife seat, a spring and a protective coat, there settles an allocation portion on said knife handle, and there settles a sliding manger for the insertion of the sliding block settled on the knife seat on the bottom of the allocation portion, and the holes is in connection with the allocation portion, and the spring on the rear end of the knife seat is in connection with the rear end wall facet of the allocation portion, the surgeon knife could be placed within the allocation manger by means of controlling the sliding movement of the sliding block of the knife seat in the sliding manger which fixes the knife seat within the rear end of the knife handle.
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