In order to lay a solid theoretical foundation for the physical manufacture of gravity gradiometers at, this paper mainly studies the signal simulation generation of the umbrella-type full-tensor rotational accelerometer gravity gradiometer, simulates the measurement process of the umbrella-type gravity gradiometer through semi-physical simulation experiments, and tests the performance of the tensor gravity gradient simulation system The test data is the three-disk accelerometer data of the umbrella-type gravity gradiometer in the ideal state generated by MATLAB. The data is loaded into the full tensor gravity gradient simulation system and demodulated to obtain the cross and inline gravity gradient component, the full tensor gravity gradient value in the measurement coordinate system is obtained through the linear operation, and then the coordinate system is converted to obtain the gravity gradient value in the platform coordinate system. The results show that the measurement accuracy of the simulation system reaches 1E(1E=1×10-9 s-2).