Aiming at the problems of large volume, poor insertion loss and isolation of MEMS SP7T switch at present, a kind of SP7T MEMS switch based on "meter" power divider is designed. RF MEMS switch unit and "meter" power divider are designed by HFSS software, and the S parameter and standing wave ratio of the switch are simulated and studied. The mechanical performance of RF MEMS switch unit is analyzed by COMSOL software. The results show that the insertion loss of each 端口 of SP7T MEMS switch is better than 0.45dB@40GHz, the isolation is better than 29.5dB@40GHz, the standing wave ratio is less than 1.45, and the volume is only 0.65 mm× 0.5 mm× 0.5 mm. This design can be integrated with filters, attenuation resistors, antennas, etc. It can be used in multi-channel tunable MEMS devices, and has certain application value in satellite communication, radar and microwave test systems.