Aiming to determine the mechanisms by which the funnel-web spider (Allagelena difficilis (Fox)) reacts to multiple external stimuli, the sensilla on its body surface were studied by scanning electronic microscope (SEM). Six male and female spiders that are fixed in 70% alcohol solution were rinsed several times with distilled water. Having been dehydrated in alcohol of different concentrations, they are displaced with tert-butyl alcohol. Finally, the sample was observed after critical point drying and metal films. The investigation found that there are several types of sensilla on the body surface of Allagelena difficilis. Hair sensilla are dominant, which include trichobothrium (Fig.1), gustatory hairs (Fig. 2), tactile hairs (Fig. 3), sigmoidal setaes (Fig. 4), spines (Fig. 8 and Fig. 10) and plumose hairs (Fig. 9), are found on various parts of the body surface. The sandwich-like mechanosensory organs (Fig. 6) are the second most common in amount and are distributed widely over the dorsal and ventral surfaces of the spider’s abdomin as well as the legs. The cell half-ball-like mechanosensory sensilla (Fig. 7), single slit sensilla and the lyriform organs (Fig. 5) are mainly dispersed over the surface of the spider’s legs.