Abstract: 0-7.2℃model was used as estimation of the chilling requirement（CR）for bud of 11 floricane raspberry（Rubus idaeus L.）and blackberry(Rubus idaeus L.) cultivars in order to provide references for protected cultivation. These 11 cultivars were treated in 5℃ constant temperature cold storage. At the same time, we studied techniques of chemical dormancy breaking on other two floricane raspberry cultivars. The results showed that: the chilling requirement of different raspberries and blackberries were significantly different as variety，ecological environment, temperature during dormancy stage and development situations of floricane varied. The CR data changed from less than 672h to 1344h.Among the 11 raspberry and blackberry cultivars, those with low chilling requirement (less than 672h) were ‘Bristol’ and ‘Shawnee’, those with high chilling requirement (1344h) was ‘Reveille’, and the rest were between them. The different concentration had different effects in breaking different bud dormancy of raspberry cultivars. The range of effective concentration of GA3 treatment on ‘Xia 17’was wide; while H2NCN treatment behaved well just as 0.1% and 0.3% treatment ,and it would become worse, or even poisoned, when more than 0.5%.However, the effects of all these treatments on ‘Xia 19’ were not so obvious compared with control check.