The present invention provides a modified silage tank comprising a trough body and a drainage unit. The trough body comprises a bottom and two adjacent walls, the bottom surface of the bottom is at the same level, and the bottom has a first edge, a second edge, and a a third edge and a fourth edge, the first edge is opposite to the third edge and adjacent to the second edge and the fourth edge, and the two adjacent walls are respectively disposed on the second edge and the fourth edge, and the distance from the top surface to the bottom surface of the bottom is The first edge is tapered toward the third edge and the direction from the second edge to the fourth edge. The drain unit is disposed in the slot and includes a first drain channel and a second drain channel. The first drain channel is located at the first drain channel. The three edges, the second drainage channel is adjacent to the fourth edge, and the modified silage tank is tilted in two directions by the bottom to accelerate the drainage of the fermentation liquid, reduce the odor and avoid affecting the fermentation quality.本創作提供一改良型青貯槽，其包含一槽體及一排水單元，槽體包含一底部及二鄰牆，底部的底面呈相同水平高度，底部具一第一邊緣、一第二邊緣、一第三邊緣及一第四邊緣，第一邊緣相對第三邊緣並鄰接第二邊緣及第四邊緣，二鄰牆分別設於第二邊緣及第四邊緣，底部的頂面到底面的距離，由第一邊緣向第三邊緣的方向及由第二邊緣向第四邊緣的方向距離漸縮，排水單元設於槽體並包含一第一排水道及一第二排水道，第一排水道位於第三邊緣，第二排水道鄰近第四邊緣，改良型青貯槽藉底部朝兩個方向傾斜能加速排流發酵液，減少異味及避免影響發酵品質。
