According to China conditions, a great deal of towed howitzer is equipped at present. In order to meet the demands of future digital battlefield, towed howitzers are necessary to be digital transformed. Combined with foreign army situation in towed howitzer digital transformation, it can be concluded that electromechanical integration technology is the key. Beside the traditional fire control system and GPS, gesture measuring, trajectory correction and so on should be merged into towed howitzer digital transformation to improve operational effectiveness.