The high performance perovskite solar cell is fabricated using unique and well-defined morphology of polyaniline nanoparticles (PANI-NPs) as efficient hole transporting layer (HTL) with methyl ammonium lead iodide perovskite (CH3NH3PbI3) as sensitizer to fabricate the high performance perovskite solar cell. PANI NPs are simply synthesized by the oxidative chemical polymerization of aniline monomer at 0-5 oC. The reasonable solar-to-electricity conversion efficiency of ~6.29 % with high short circuit current (JSC) of ~17.97 mA/cm2 and open circuit voltage (VOC) of ~0.877 V are accomplished by Ag/PANI-NPs/CH3NH3PbI3/mp-TiO2/bl-TiO2/FTO perovskite solar cell. The IPCE measurement reveals that the fabricated Ag/PANI-NPs/CH3NH3PbI3/mp-TiO2/bl-TiO2/FTO perovskite solar cell presents the maximum value of ~51% in the wavelength range of ~450-700 nm and drops at longer wavelengths. The transient photocurrent and photovoltage studies reveal that the fabricated solar cell shows better charge transport time, diffusion coefficient, diffusion length and the charge collection efficiency. Herein, the use of PANI NPs as HTL improves the charge carrier generation and the charge collection efficiency of the fabricated solar cell.