A cleaning trough device for a treadmill conveyor belt is disclosed. Its structure includes: a cleaning tank body, a transmission seat, a moving wheel rod, a hand-holding pole support frame, an intelligent display, a motor and a running conveyor belt, the running conveyor belt is mounted on the outside of the transmission base and is in clearance fit with the transmission base, a left end of thattransmission seat is provided with a motor and is locked with the motor, at both end of that motor, so that that device can be use, by means of the separated brush cleaner mechanism, as a result, theinvention can be realized to avoid that in the running of the treadmill, the sole sand tends to stay on the treadmill conveyor grain, the surface of the accumulate conveyor belt is very dirty, the aesthetic effect is affected, because the run belt operation may be involved in the electric motor, the equipment breaks down, and a little wiping with a dishcloth is need manually when cleaning, the problem of time is wasted, so that the equipment cleans up dirt such as grain sand on the surface of the conveyor belt of the treadmill more quickly and conveniently.