Spring performance automatic testing device

The invention discloses a spring performance automatic testing device and a method of improving testing accuracy. A tested spring is micro pressure spring which is used in a geophone. The automatic testing device is composed of three parts, namely a mechanism structure, a transmission structure and a testing and controlling circuit. A stepping motor and a linear guide rail are vertically installed, and a pressure measurement module is horizontally installed. When a slider on the linear guide rail is driven by the stepping motor to vertically reciprocate, the slider drives a circular rotating disc to achieve automatic placement of the batch of the springs to be tested and automatic testing of the performance of the springs to be tested. The spring is compressed to the preset position by using a pressure plate which is connected with a dual closed-loop controlling driving slider, current elastic values are tested in real time by the pressure measurement module, and thereby the elastic value and stiffness factor