The invention discloses a device for preparing a supported catalyst by spraying. The device comprises a pot-bellied
glass tube and an
oil bath pan, wherein the two ends of the pot-bellied
glass tube are provided with openings, and a
reaction chamber is arranged in the middle of the pot-bellied
glass tube; the pot-bellied glass tube is arranged on the
oil bath pan through a support, and the pot-bellied glass tube is connected with a motor through a transmission device; one end of the pot-bellied glass tube is connected with a watering pot, and a spray
pipe of the watering pot extends into the
reaction chamber of the pot-bellied glass tube; a
nozzle is arranged on the spray
pipe, and a first sealing plug is arranged between the spray
pipe and the pot-bellied glass tube; the other end of thepot-bellied glass tube is connected with an L-shaped
elbow pipe through a second sealing plug, and the pipe body of one end, away from the pot-bellied glass tube, of the L-shaped
elbow pipe is sleevedwith a condensing device. The invention also discloses a method for preparing the supported catalyst by spraying by utilizing the device. The device provided by the invention has reasonable design and simple structure, can prepare the catalyst in which uniformly dispersed
active components are dispersed on the surface of a carrier, and provides a novel solution for preparing the granular supported catalyst in a laboratory.