1、准备一直径为15-30cm的圆环和两根辅助绳；
1. Prepare a circle with a diameter of 15-30 cm and two auxiliary ropes.
2、将两根辅助绳系在圆环上，连接好后将其横跨已覆盖薄膜的大棚，使得大棚两边工人A、B各够到一根辅助绳；
2. Two auxiliary ropes are tied to the ring and connected to cross the film-covered greenhouse so that workers A and B on both sides of the greenhouse can reach one auxiliary rope.
3、取压膜线，工人A将压膜线的一端穿过圆环并与大棚边事先固定好的挂钩连接；
3. Take the film-pressing line. Worker A will pass one end of the film-pressing line through the ring and connect it with the hook fixed beforehand at the edge of the greenhouse.
4、待工人A将压膜绳连接固定后工人B拉辅助绳，在圆环的作用下，压膜线随圆环拉至大棚另一边工人B处，工人B将压膜线拉紧后与大棚边挂钩连接固定；
4. When worker A connects and fixes the film-pressing rope, worker B pulls the auxiliary rope. Under the action of the ring, the film-pressing line is drawn to worker B on the other side of the greenhouse. After worker B tightens the film-pressing line, it is connected and fixed with the hook at the edge of the greenhouse.
5、待工人B将压膜绳连接固定后工人A再重复工人B的动作，如此往复，直到大棚压膜完成。
5. Worker A repeats the action of worker B after worker B connects and fixes the film-pressing rope until the film-pressing is completed in the greenhouse.
大棚压膜线选用时应注意其质量，及其抗拉伸强度和柔韧性才可保证更好的作业，一般是需要将压膜线的底端可以通过地桩埋入土中，也可以直接系于砖块埋入土中。
The quality, tensile strength and flexibility should be paid attention to when choosing the film-pressing line in greenhouse to ensure better operation. Generally, the bottom of the film-pressing line can be buried in soil through ground piles or directly tied to bricks.
之所以会使用大棚压膜线，主要是由于这样做不易伤害薄膜，还能将薄膜固定紧。
The main reason why the film-pressing line is used in greenhouse is that it is not easy to damage the film, but also can fix the film tightly.