Based on the principles of near field acoustical holography by wave superposition, the causes of inaccurate results generated by the equivalent source collocation and noise are analyzed. The effects of the variety of reconstructive parameters including reconstructive distance, reconstructive frequency, equivalent source numbers, equivalent source radius and signal to noise ratio (SNR) on the reconstructive precision have been studied in this work. The results show that the proposed near field acoustical holography based on wave superposition method has expanded the application range of reconstructive distance comparing with the planar near field acoustical holography based on the space Fourier transform method. The reconstruction of acoustic source at below 5 kHz can obtain good result by using the near field acoustical holography based on wave superposition method. The equivalent source radius is selected as less than 0.8 times of that of the radiator at the best.