A dry-type shell-tube spoiler evaporator for a water chiller comprises a housing, a copper tube, a front end cover, a rear end cover and a plurality of spoilers, wherein a water inlet and a water outlet are formed in the middle of the same side surface of the housing, located on the same horizontal line, and correspondingly located in the positions farthest from the front end and the rear end of the housing; the copper tube has a smooth inner wall surface and a threaded outer wall surface; sleeves are welded at a medium inlet and a medium outlet; the outer circumference of the rear end cover is mounted and plugged at the rear end of the housing through bolts, and a gasket is arranged between the rear end cover and the housing; and a plurality of fixed rods penetrate each spoiler. The housing takes up all the space of the whole evaporator, so that lots of the space can be saved by forming the water inlet, the water outlet, the medium inlet and the medium outlet in the housing in advance, and accordingly, the design of a main engine is optimized; and the water inlet and the water outlet are formed in the side surface of the housing of the evaporator, so that maintenance and repair are easy, and failure check and installation inside and outside the main engine are facilitated.