The thermodilatometry was used to study αZr→αZr βZ phase transformation kinetics at various heating rates in Zr-1Nb-0.01Cu alloy. The results show that the relationship between the start transformation temperature of αZr→αZr βZr and the heating rates is as follows: Tα→α β=744.4 9.4ln(RH), and the heating rates show lower influence on the transformation temperatures compared with that of E110 alloy. The active energy of αZr→αZr βZr is 149.1kJ/mol which is calculated from JMA model, and it is smaller than that of Zr-4 and M5 alloys.The continuous heating transformation diagram (CHT) of αZr→αZr βZr is given according to phase transformation curves of the alloy.