Optical signal receiving and adjusting device

The utility model relates to an optical signal receiving and adjusting device, which comprises a fixing base for fixing an isolator. A light shield is arranged on the fixed base; the light shield is provided with a power detection port which faces the light emitting direction of the isolator and is used for placing a power meter, and a side detection port which is arranged on the side and is used for placing an oscilloscope test probe. The light shield is slidably connected with a light shield plate which is used for controlling the size of the side detection port so as to change the light intensity received by the oscilloscope test probe. The device is small, exquisite, simple in structure and convenient to operate, and does not need to occupy too much space. The simple adjusting function of an oscilloscope knob switch can be replaced, the service life is longer than that of the knob switch, and reliability is higher. A certain shielding effect is achieved on output laser, and operators can be protected. 本实用