The invention provides a locking plate structure for a hospital cart. The locking plate structure comprises stand columns, a side plate, adjustment-free connecting rod locks, locking plate connecting parts, locking plates, locks, self-tapping screws, anti-theft screws and covers. The locking plate structure has the advantages that protruding blocks arranged at the two ends of the side plate are clamped in grooves formed in the stand columns, connection is performed through concave and convex occlusion, the side plate can be installed on the stand columns conveniently, two screw holes are formed in the locking plates and used for assembling the anti-theft screws and the locking plate connecting parts, the phenomenon that the connecting parts loosen is avoided, the tightness of connection between the locking plate connecting parts and the locking plates is improved, the self-tapping screws and the anti-theft screws are sleeved with bolt gaskets, the part surface can be prevented from being worn out, the looseness preventing effect can be achieved, the covers cover the anti-theft screws in the screw holes formed in the locking plates, the anti-theft screws are hidden under the covers, and the phenomenon that in the long-term use process, the anti-theft screws make contact with water stains to rust, and the overall appearance of the cart is affected is avoided.