Abstract: It gives the relationship between the electrostatic field distribution and the geometric parameters on the cheme of the ontrollable electrostatic double-well. The dependency relationship between the trapped central position and the system parameters was also given in this paper.The results show that, position of the trapped central , depth of the trapped well and volume of the well can be changed by changing the scheme system parameters ,thus the cold molecular can be obtained by the Stark deceleration, and even the higher temperature cold molecular can be realized by selecting suitable system parameters.

Key words: Atomic and molecular optics, Controllable Electrostatic Double-well, Electrostatic Field Distribution, Trapped Molecular