By split-step Fourier method,the optical pulse compression in DDF was simulated and analyzed,in case of different fiber length and dispersion profile curve.The effect of the highorder soliton compression in linear DDF was detailed,either the fiber length or the soliton order.It shows that high-quality ultra-short optical pulses with little pedestal energy and low frequency chirp can be provided,particularly,several factors mentioned above which has important influence to the pulse compression properties,such as compression ratio,peak power and pulse pedestal energy was considered.These conclusions will be a practical guide of the optical pulse compression in DDF.