During biomimetic designing and manufacturing insects trapping plate, the attachment force and friction force of insects on materials, as well as the shear force and fracture force of insect attachment system should be measured accurately. To satisfy the demand of measuring force with mN magnitude, tension compression force measuring system was designed. The hardware of this system consists of force sensor, force measuring platform and mechanical structure matched force sensor, force sensor signal conditioning module and data sampling card. Based on virtual instrument Labwindows/CVI, the data processing and displaying program was achieved. The experimental results confirm that the tension compression force measuring system can measure the force with mN magnitude accurately, and can display the force change intuitively and in real-time, as well as save the force track diagram and data group effectively. The measuring range and precision of this force measuring system is 3. 0N and 0. 1 mN, obviously satisfy the demand of biomimetic designing and manufacturing insects trapping plate.