Abstract: In order to confirm whether the ZKX2448 linear vibrating screen was working in the structure resonance accurately, the ZKX2448 linear vibrating screen was tested and analyzed by using the INV3018CT 24 bits high precision data acquisition instrument and DASP-V10 analysis software. First through experimental modal and working frequency testing, qualitative judged that vibrating screen was working in nearly 7 order inherent frequency; Then measured vibration track of the screen by six measuring points, and compared to the modal shape to confirmed the sieve machine′s structure resonance; Finally, through the amplitude and phase of 6 points in X, Y, Z three directions, obtained deformation degree by quantitative, found the area where is easy to damage , and provided the basis for the choice of the reasonable working conditions.