The utility model relates to a pump-suction sediment collector consisting of a pump truck and a mud pump which is arranged on the pump truck and is connected with a sediment discharging pipe; left and right ends of the pump truck are respectively articulated with bell-shaped left and right sediment collectors and are provided with left and right sealing doors which are connected into a whole; traction hooks are respectively arranged on the left and right sealing doors. The collector is specifically used for clearing the sediment in an underground sump of a mine; the collector automatically and continuously runs along a set rail under the effect of external motive force to effectively collect and gather the solid sediment in the sump; then the sediment is pumped out of the sump to be treated; the collector has simple structure, good using effect and rapid clearing speed; therefore the collector can reduce labor intensity of workers and is not affected by the operation of the sump, with wide practicality.