Silicon photomultiplier tubes (SiPM) is a new type of photoelectric detector, which has the advantages, such as high gain, high sensitivity, low bias voltage, insensitive to magnetic field and compact structure. The adapter circuit of SiPM is researched and designed, which includes a power supply and transimpedance amplifier circuits. Simulation software is used to simulate the designed circuits. And the structural parameters of the circuits are optimized. Finally, the adapter circuit is made and the test results show that the adapter circuit has a good output response to 100 kHz optical signal, output amplitude reaches volt level, which meets the design requirements.