The casual relationship between loss and malfeasance behavior should be ascertained on calculating extent of heavy loss and only those that have casual relationship in criminal law with malfeasance behavior can be calculated in heavy loss. 重大损失的计算范围上,应该严格查明损失和渎职行为的因果关系,只有那些与渎职行为有刑法上因果关系的损失才能计算在重大损失的范围之内。