Abstract: In order to reduce unsafe acts of personnel in derailing accidents of inclined shaft trip lifting in coal mine, by applying the accident causation “2-4” model, the derailing accidents of inclined shaft trip lifting were studied by statistical analysis and classification. The results showed that derailing accidents resulting in casualties required to satisfy three conditions: vehicles out of the mechanical control, failure of the protective facilities, persons in the danger zone. The most critical unsafe acts causing the vehicle to spin out of control including: do not stop lifting work due to the serious wear of the wire rope; use connecting pin without locking device; do not insert the tube plug in the end; fail to deal with hidden trouble of broken wires in wire ropes overrun. The main unsafe acts causing the failure of the protective facilities including: do not treat the hidden danger of protecitve device for derailing accidents; do not attach safety rope to the trip hoisting; do not install protective devices. The derailing injuries caused by people in dangerous areas accounted for 74.55% of the total accidents, including two types of actions: illegal driving and waiting in dangerous places, walking and operation. 72.73% of the accidents of inclined shaft trip lifting involved the common unsafe acts, among which the number of illegal driving, waiting for a car in a dangerous place and walking accounted for 80.39% of the total number of the common unsafe acts, which was the focus of the training on the common unsafe acts.