Secondary regulation is novel hydraulic transmission technology which possesses many outstanding advantages, such as convenient controlling, easily composing network components just like that in an electric system, and even simpler energy recovering and regeneration than in an electric system. Researches in secondary regulation technology will have no hesitation to enlarge the application scope and enhance the product competitive power of the hydaulic system. Torque servo loading system is a typical equipment in secondary regulation research with; briniant application future. In the paper, by modeling a secondary regulated torque loading system in detail, some nature dynamic characteristics of secondary regulation technology is analyzed. Finally, a computer control system of the secondary regulated loading equipment is established and several experimental curves prove the theoretical analyzing results.