The utility model discloses a well type multicomponent thermochemical treatment dedicated furnace for a high-speed locomotive motor suspension plate spring. A sectionalized heating resistance wire is arranged between a heat-preservation shell (37) and an inner tank (33) sleeved inside the heat-preservation shell, a support (34) used to suspend the high-speed locomotive motor suspension plate spring (35) is arranged in the middle of the inner tank (33), and an air-guiding cylinder (31) is arranged outside the support. A furnace cover (4) is supported on a furnace cover lifting mechanism (36) and provided with a centrifugal circulating fan (1) and a multicomponent thermochemical treatment air-inlet pipe (38). The well type multicomponent thermochemical treatment dedicated furnace can carry out multicomponent thermochemical treatment on the high-speed locomotive motor suspension plate spring conveniently, and has the advantages of being low in manufacture cost, simple to assemble and easy to construct.