With female Hemiberlesia pitysophila adult as the host, this paper studied the parasitic functional response of Coccobius azumai in laboratory. The results showed that the response of C. azumai fitted Holling Type II equation, and was affected by temperature and the densities of host and parasitoid. At the same temperature, the number of parasitized host increased with increasing host density. At 15 degrees C-25 degrees C, the parasitized number increased with temperature; while at 25 degrees C-35 degrees C, it was in adverse. There was a stronger intraspecific interference in the parasitic functional response of C. azumai, i.e., the number of parasitized host decreased with increasing C. azumai density. The relationship between searching efficiency (E) of C. azumai and its density (P) could be well simulated as E = 0.1659P(-0.5597) by Hassell (1969) model E = QP(-m) and as E = 0.1437T/ [1 + 0.2691 (P -1)] by Beddington (1975) model E = aT/[1 + bt(w) (P-1)].