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The dynamic longitudinal misalignment angle of the precision centrifuge is an important component which affects the accuracy of acceleration outputted by the precision centrifuge, it must be accurately measured, and as a compensation component, the measurement result should be added to the outputting acceleration model, it makes the precision centrifuge output high precision acceleration. In this paper, the test method of the dynamic misalignment pitch angle of the precision centrifuge with the use of a capacitance micrometer and external reference is introduced in detail. Through digging two positioning slots on the rotary table, by positioning measuring the dynamic pitch angle relative to the surface of earth of the part between two positioning slots, and using the way of measurement values point-to-point subtraction of high G running state and low G running state to eliminate the surface shape error being measured, thus, the high precision measurement result of the dynamic misalignment pitch angle will be obtained. The principle of positioning measurement method is introduced, and the verification test has showed that this measurement method is feasible.