In order to investigate the interaction between GFRP pile and soil as well as dynamical mechanics effect in driving pile，model test of jacked GFRP piles was conducted，and the heave of topsoil and radial squeezing pressure were analyzed. The results show that the heave of topsoil reaches the maximum value when the radial distance is equal to 1.8 times the pile diameter. The maximum value decreases with the increase of the depth of piling and eventually stabilizes at about 5 percent of pile diameter. Radial squeezing pressure in a certain depth first increases and then decreases with the increase of the depth of piling，and reaches the maximum value when the depth of piling is equal to the depth of measure point. The maximum value of radial squeezing pressure，Pm，decreases with the increasing radial distance. When the radial distance increases to be three times of the pile diameter，Pm reduced to thirty percent of P mm (i.e.，the peak value of Pm) or less.P mm appears at the lower part of the pile，whose value is roughly in proportion to the pile diameter.