In this paper, the dynamical behaviors of a delayed predator-prey model (PPM) with nonlinear harvesting effortsby using imprecise biological parameters are studied. A method is proposed to handle these imprecise parameters by using a parametric form of interval numbers. The proposed PP M is presented with Crowley-Martin type of predation and Michaelis-Menten type prey harvesting. The existence of various equilibrium points and the stability of the system at these equilibrium points are investigated. Analytical study reveals that the delaymodel exhibits a stable limit cycle oscillation. Computer simulations are carried out to illustrate the main analytical findings.