Abstract：Body area communication based on quasi-electrostatic field is a new technology to implement the inter-connection between personal pocket electronic devices. The effect of body movement on performance of body area communication system was studied. Channel gains on body standing, making time, and running were measured in experiments. Based on the experiments' data, the cumulative distribution function of channel gain was acquired and compared with several general statistics distribution. Channel gain obeyed normal distribution. Parameters were estimated using maximum likelihood method. The mean, standard deviation and confidence interval were acquired. Then, channel statistical and simulation model has been established to analyze the system performance. Within the environment of Gaussian white noise, the effect of body movement on system performance of amplitude shift keying modulation was simulated. The general methods of body area communication channel modeling and simulation were given. Results show that Bit Error Rate (BER) increased slightly with fierce degree of body movement.