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Chain plate conveyors are commonly used material conveying equipment in industrial production. Although they are quite ordinary, they play a crucial role in ensuring the proper operation of the entire production system. In actual production, failures in chain plate conveyors often manifest as problems with the conveyor chains. The conveyor chains of chain plate conveyors are the main components of such conveyors and serve as crucial traction devices; they consist of connecting links, chain plates, and link connectors. Therefore, the quality of the selection of various components of the conveyor chain in a chain plate conveyor plays a crucial role in the proper operation of the conveyor. In light of this, this paper focuses on analyzing the causes of failures in the conveyor chains of chain plate conveyors, with the aim of reducing the failure rate of such conveyors as much as possible, lowering maintenance costs, and improving production efficiency. 1. Fault types: The fault types of the chains in chain conveyor systems include the following: damaged chain plates, the conveyor chain coming out of its groove in the chain plate mechanism, the conveyor chain falling off the drive sprocket, broken connecting links, and damaged link connectors. 2. Cause analysis: Chain plate damage is mostly due to excessive wear and bending deformation, with cracking occurring occasionally. The main reasons for this are: ① The bottom plate of the sprocket groove is not laid evenly, or it has a bending angle that exceeds the design requirements ； ② The bottom plate of the chain plate machine groove is not properly fitted, or it is locally deformed ； ③ Larger clumps of material being transported can be squeezed or stuck during operation, causing the conveyor chain to experience extremely high impact stresses in an instant ； ④ When the distance between adjacent chain plates exceeds the critical value, prolonged operation under overload conditions leads to damage to the chain plates.