The utility model discloses a reinforcing connecting structure of a door plate and a frame of a passenger car cabin door. The reinforcing connecting structure of the door plate and the frame of the passenger car cabin door comprises the door plate of the passenger car cabin door and the frame of the passenger car cabin door, the door plate is tightly fixed and connected with the frame through a stud bolt. The reinforcing connecting structure of the door plate and the frame of the passenger car cabin door has the advantages that the application of the reinforcing connecting structure of the door plate and the frame of the passenger car cabin door can effectively reduce dependency of adhering connecting quality on operation quality, reduce influence of partial adhering connection defect on stability of the adhering connection quality of the door plate, and improve the dependency of the adhering connection quality of a door body; the application of the reinforcing connecting structure of the door plate and the frame of the passenger car cabin door can effectively shorten adhering connection and solidity time for a cabin door in adhering connection of a mold, reduce occupied area of tools for adhering connection of the cabin door and reduce investment and cost of the tools.