The Dual Probe Heat Pulse (DPHP) method is an important method to measure specific heat (c), thermal conductivity (λ) and temperature ( T ) of soil. However, there are a number of factors that may cause errors in measurement of bothλλ and c using DPHP, such as soil pores. With finite element method (FEM) simulating DPHP experiments ,three kinds of quartz sands which different in particle size were used to analyze the effect of soil pores on measurement of specific heat with the DPHP method, and the result shows that (1) soil pores caused significant anisotropy of spatial distribution of measured temperatures and led to a relative difference, reaching as high as 23% in c measured between different spots 6mm away from the heater in different directions; (2) the standard deviation of the measurement of the soil thermal properties with DPHP increased with the increasing particle size, which was consistent with the observation during the experiments; and (3) the existence of soil pores led to overestimation of c when the DPHP method was used. In this simulation, the specific heat measured at 6 mm away from the heater was overestimated by about 6%.