Biorock is one of transplantation method which succesfull in coral reef restoration activities. The result of any research in several countries has been proven that biorock technology is capable to accelerate growth and increases the survival rate of coral reef ecosystem in extreme environmental conditions. The objective of this research out the effects of electrical voltage difference and initial fragment size in biorock transplantation method toward coral growth and survival rate. The materials observed in this study were fragments of coral Acropora cerealis in Pemuteran Beach, Bali. The study was conducted by using field experiment method and the coral transplantation method were carried out by using biorock technology. The main parameters were the growth and survival rate of the coral. Supporting data in this study were water physical and chemical parameters, including: temperature, salinity, pH, mineral sedimentation, and brightness. In addition, the highest growth and survival rate could be seen in 6 volt biorock method on both fragment sizes.