‘Tianjiao No.13’ is a new hot pepper F₁ hybrid developed by crossing 10-37 as female parent and 10-178 as male parent. It is of medium maturity. The plant has medium growth vigor. Its fruit is of sheep-horn shape. The fruit is 17.5 cm in length and 3.2 cm in width. The single fresh fruit weight is about 35.4 g. The immature fruit is green，and ripen one is dark red in color. The clarity of the pigment is 15.8. It is suitable for the extraction of Capsanthin. It can yield about 6 t·hm^-2 dry pepper，which is about 50% higher than that of‘Meiguohong’.Its resistance to virus disease，phytophthora blight，anthracnose and powdery mildew are stronger than that of the contrast‘ Meiguohong’. It is suitable to be planted in open fields in Gansu Province.