This paper presents a comprehensive analysis of spectrum sensing (SS) in cognitive radio (CR) network. The main function of cognitive radio is detecting unused spectrum and sharing it without harmful interference to the licensed user. Cooperative spectrum sensing refers to incorporation of multiple secondary users (SU) to analyze the primary user (PU) signal in order to achieve more accurate detection performance. In order to solve the sensing failure problem in conventional two threshold energy detection method soften hard decision fusion mechanism is used exploiting all the sensing results. Consideration of the confused region which is the intersection of the energy distribution of PU signal and noise. SUs could not distinguish between the absence or presence of the primary user in the confused region. So the fusion center makes a soft combination of the observations. The objective of this paper is to produce an efficient spectrum sensing algorithms using two thresholds with soften hard decision fusion mechanism.