Abstract: The life history of Cheyletus Malaccensis oudms was reported in this paper.It consists of egg stage, larve stage, Protonymphal stage, deutonymphal stage and adult.The mites were reared in separately small special cell at 18-26℃.The whole life history requires 48-50 d.Each mite eats about 10-12 preys/d and five hundreds preys in its whole life history.Unchanged the numbers of preys, the preing capacity decreased with C.malaccensis oudms density increased.The model was A =16.5462P-0.5725 (r=0.96).The model of oviferous number of predator to prey density was Y=6.65 +5.64X (r = 0.96).The model of the relationship of systematic number between C.malaccensis and L.destructor was:dN/dt=N(0.76+0. 62P) and dP/dt=P(-0.50-0.11N).