Ultrasonic ranging apparatus

The utility model provides an ultrasonic ranging apparatus, comprising an ultrasonic transceiver module, a control module, a 423 switching board, a button module, a voice play module, a horn and a switch module, wherein an output socket of the control module is in connection with a control interface of the ultrasonic transceiver module through a guide line with a plug; an input socket of the control module is in connection with a four-wire socket of the 423 switching board through a guide line with a plug; a button signal output socket of the button module is in connection with a two-wire socket of the 423 switching board through a guide line with a plug; a first output socket of the switch module is in connection with another two-wire socket of the 423 switching board through a guide line with a plug; a signal receiving socket of the voice play module is in connection with a three-wire socket of the 423 switching board through a guide line with a plug; an output socket wire of the voice module is in connection with the horn.