In this paper a novel high gain Op-Amp design is presented. This Proposed circuit also exhibits high linearity. The Architecture of the Op-Amp presented in this paper is based on cross-coupled differential pair and positive feedback. The proposed Op-Amp is designed in 0.18 mu m CMOS process using UMC90nm library in Cadence virtuoso analog design environment. The simulation of proposed circuit results in 124dB gain, 307MHz UGB and 69 degree phase margin while dissipating 221 mu W power. The THD analysis of the circuit shows a maximum distortion of 63dB at 2V output peak-to peak voltage and 1KHz frequency.