The invention relates to a wireless depth counting device for an oil well. The wireless depth counting device for the oil well is mainly used for solving the problems of easiness in insulation fault, circuit break or short circuit fault and frequent maintenance and replacement of the present wired transmission counting device. The wireless depth counting device is characterized in that a gear shaft is fixed on an insert plate through a rolling bearing, a bearing gland, a bolt a and a bolt b; the insert plate is connected with a protecting shell through a screw thread and a sealing ring; a fixing ring is connected with the gear shaft through a pin nail; an actuator a and an actuator b on the fixing ring are not in contact with a sensor; a depth signal collecting plate, a depth signal emitting plate and a battery cabin are built-in the protecting shell, are sealed through a sealing end cover and a sealing ring and can remotely send a depth signal in an airtight space. According to the invention, the wired transmission is changed into the wireless transmission, human and material resources are saved, the operation construction is convenient and quick, the performance is stable and the maintenance is convenient.