Elevator door safety circuit

The utility model discloses an elevator door safety circuit which comprises a chip U1, a chip U2 and a chip U3. According to the elevator door safety circuit, a single-chip microcomputer U2 is used for controlling a key switch signal and a signal of an infrared receiver U3, priorities are set for the two signals, when the infrared receiver U3 receives the signal of existence of an obstacle in the door closing range, a key switch S1 and a key switch S2 are out of order, and only when the infrared receiver U3 receives the signal of no existence of the obstacle in the door closing range, can a door be normally opened and closed. The elevator door safety circuit can operate independently from an elevator operating system, the probability of pinching accidents is greatly reduced, and the elevator door safety circuit is low in cost, and has high use and application value.