Signal receiving anti-interference enhancement device and anti-interference method of network analyzer

A signal receiving anti-interference enhancement device of a network analyzer and an anti-interference method are disclosed, the signal receiving anti-interference enhancement device comprises a mounting rack, the top of the mounting rack is fixedly connected with an angle adjusting mechanism, two groups of adjusting rods arranged in a crossed manner are driven to rotate through the angle adjusting mechanism, and then a steering shaft and a fixed disc are driven to rotate; the first antenna plate, the second antenna plate and the third antenna plate are arranged on the fixed disc, so that the orientations of the first antenna plate, the second antenna plate and the third antenna plate are changed until the antenna plates directly face the transmitting direction of network signals, the receiving effect on the network signals is improved, and the interference of other signals in different directions on the detected network signals is reduced. Through the stretching adjusting mechanism, the first supporting rod,