Abstract: By means of proton bean irradiation，we bred two melon inbred named R235-6-7-9 and H22. Then we took them as female and male respectively，to breed a new cultivar of melon hybrids，which named‘Tangtian 10’. The fruit developing period is 26–30 d. All branches could fruit，while the first branches were the main. The fruit is pear-shaped，which peel is Olivine. The white flesh is crisp，with the center sugar content of 13.6%–14% and edge sugar content of 10.2%. The weight of per melon is 0.3–0.4 kg. This cultivar has demonstrated a broad adaptability and good perspective of commercialization in 14 provinces，for example Hebei，Liaoning，Tianjing，Anhui，Hubei，Henan，and Shandong.

Key words: melon, pronton beam, cultivar