An embodiment of the utility model provides a device for bentonite powder pumping aquation, wherein, device for bentonite powder pumping aquation includes: join in marriage thick liquid jar, sediment stuff pump, pumping hydrate of sodium and bentonite bucket, tangent advancing native drum and intake the drum is drawn together to the first hand ladle of pumping hydrate of sodium, it loops through inlet valve, pumping union coupling extremely to advance native drum said bentonite bucket, the drum of intaking loops through the feed water valve, the hydraulic supply line reaches the sediment stuff pump is connected to the said thick liquid jar of joining in marriage, the second end of pumping hydrate of sodium through flowing back pipeline connection extremely the said thick liquid jar of joining in marriage. Adopt the embodiment of the utility model provides a device for bentonite powder pumping aquation, in the production of drilling fluid magma, the subaerial bentonite of direct pumping flows into the well drilling fluid reservoir, and intensity of labour is little, the dust is little, bentonite powder with join in marriage pulp-water homogeneous mixing under airtight state, do not have the caking in the hydration liquid, it is efficient to join in marriage the thick liquid. Simultaneously, the problem that native powder is extravagant and the dust endangers has been solved.