The utility model discloses a special fortune tank wagon for water conservancy aqueduct erects. This fortune tank wagon be in the front, through the fixed whole vehicle that forms the distance of centre contact frame together between two back fortune groove support cars, whole vehicle is four rails no. 3 and strides the structure, fortune groove support car includes a horizontal supporting beam to with the two piece parallel arrangement s of a supporting beam axis looks vertically mode fixed mounting below propping up supporting beam a last tie -beam, tie -beam free bearing on the both ends of tie -beam rigid coupling has, go up the tie -beam free bearing and be connected through articulated mode and lower tie -beam subassembly, down the both ends rigid coupling of tie -beam subassembly has a lower tie -beam free bearing, and lower tie -beam free bearing is connected through articulated mode and compensating beam down, and the both ends of lower compensating beam are rotated the articulated mode with the level respectively and are combined with compensating beam free bearing down, and lower compensating beam free bearing and driving bogie spool articulate through selling. The utility model discloses manufacturing cost is saved to effective work height and weight that reduces the fortune tank wagon, has solved the technological problem of plane operation fortune tank wagon on large -scale thin wall opening aqueduct.