The invention discloses a photomultiplier of electrostatic focusing micro-channel plates. The photomultiplier comprises a photocathode, an electron multiplier, an anode, a focusing electrode, a power supply electrode and a supporting post for supporting the focusing electrode, the electron multiplier and the anode, the focusing electrode, the electron multiplier and the anode are arranged in a glass vacuum container, and a signal lead of the anode and the power supply electrode penetrate through the glass vacuum container to be connected with an external circuit. The photomultiplier is characterized in that the centers of the focusing electrode, the electron multiplier and the anode are coaxial, the electron multiplier comprises the two pairs of micro-channel plates arranged in parallel, and certain gaps are reserved between the micro-channel plates. Compared with the prior art, all stages of voltages of the micro-channel plates are independently adjusted, and high gains and good photoelectron spectra are achieved.