The utility model discloses a hard clamp plate protector utensil of computer protection screen cabinet, it is including installing at the preceding glass protection door plant of the cabinet body of computer protection screen cabinet, and glass protection door plant comprises last door plant and door plant down, goes up door plant and door plant down and the cabinet body through the round pin hub connection, goes up and all is provided with the lock on door plant and the lower door plant. The utility model discloses a change the glass door plant of computer protection screen cabinet into two independent door plants from top to bottom, be provided with intelligent lock on the lower door plant, only supply the people who has the hard clamp plate of authority operation just can open, can prevent effectively that someone from the mistake moving the emergence that hard clamp plate led to the fact unwanted operation of protection or the incident of refusing.