The invention relates to an underground along-pump monitoring device for coal bed gas water discharge and gas production. The device comprises an underground along-pump monitoring device and a groundcollection transmission system, wherein the underground along-pump monitoring device comprises an underground armored cable, a cable connecting hoop, a transition nipple, an ultrasonic coal powder concentration monitoring nipple, an underground circuit nipple, a pressure temperature monitoring nipple and an in-pump perturbation assembly, wherein the underground along-pump monitoring device is provided with a fixing valve, and is connected under a pump tube of a conventional water discharging pump; the ground collection transmission system supplies electricity for the along-pump monitoring device; the underground circuit nipple controls the pressure temperature monitoring nipple and the ultrasonic coal powder concentration monitoring nipple to monitor the temperature, pressure and coal powder impurity concentration change quantity in a position near the water discharging pump suck-in opening; the dynamic liquid level depth is calculated according to the pressure value; signals treated by an underground main control unit are transmitted to a well field monitoring center; when the coal powder concentration rises, the perturbation impeller rotates; the cyclone liquid carriers the coalpowder impurities to be discharged out of a pump cavity; the active cleaning in the pump and the underground parameter online monitoring are realized.