The invention relates to a multi-parameter sensor for a GD5 coal mine. The multi-parameter sensor comprises a shell and a monitoring device, wherein the shell is provided with a handle; the shell comprises an upper shell and a lower shell; the upper shell is connected with the lower shell through a supporting arm; the upper shell is provided with a display window and an alarming window; the lower shell comprises a sensor containing cavity and gas monitoring cavities formed in the two sides of the sensor containing cavity; and the monitoring device comprises a battery, a sensor, a signal converter, a signal amplifier, a filter, a data acquisition card, a data storage device, a CPU (Central Processing Unit), a digital tube display, a signal chip microcomputer, an alarm, a wireless transmission module, an Internet network and a remote monitoring host. An electronic instrument, which adopts an electrochemical principle, and is intelligently controlled by an embedded type controller and displayed by a digital tube, is simple to operate, is convenient to use, is safe and reliable, and is mainly used for detecting and alarming methane, oxygen, carbon monoxide, hydrogen sulfide and carbon dioxide.