The invention provides a car door sealing strip structure and a car door. The car door sealing strip structure comprises a sealing strip body, wherein the sealing strip body is installed on the car door and abuts against a car body, so that sealing between the car door and the car body is achieved. The sealing strip body is provided with a first installing main body and a second installing main body which is connected with one side in the width direction of the first installing main body and located close to the outer side of the car door. A first clamping connection part and a first sealing part extending towards one side of the car body are arranged on two opposite sides of the first installing main body separately. A second clamping connection part and a second sealing part extending towards one side of the car body are arranged on two opposite sides of the second installing main body separately. The first clamping connection part is matched with the second clamping connection part,so that the sealing strip body is in clamping connection with the car door. An included angle of 90-150 degrees is formed between the width direction of the first installing main body and the closingdirection of the car door. The car door sealing strip structure provided in the invention can seal the space between the car door and the car body, and thus the sealing strip has good leakproofness.