A monaxial gravity gradiometer based on configuration of rectangle prism is proposed in order to realize gravity gradient measurement in resonance mode. The gravity gradiometer is based on principle of torsion measurement

mass block use configuration of rectangle prism

it can reduce random noise and enhance spatial resolution. The design configuration realizes accurate measurement of gravity gradient

reduce influence of gravity field in other directions on measurement

give mathematical model for structure of rectangular prism gradiometer

structure of monaxial gradiometer is simulated. The simulation results show that the gravity gradiometer realize gravity gradient measurement in resonance mode

it has the characteristics of simple structure

high sensitivity.