Disclosed is a method for calculating the depth of sprayed water of a translational sprinkler in different working conditions, involving placing rain barrels (3) in n rows in the movement direction of a translational sprinkler (1), each row having m barrels, such that the spray radius of rain droplets can completely cover the rain barrels (3) while ensuring that the translational sprinkler (1) is spraying stably； calculating the average sprinkler strength of each rain barrel (3)； drawing a relationship curve of the sprinkler strength and the distance from the centre； setting the movement speed s of the translational sprinkler (1)； establishing a function relationship between a sprinkler strength d′； and time t； calculating the time t2 needed for the translational sprinkler (1) to completely pass one of the rain barrels (3)； and with the condition that the movement time is t2, performing mathematical integration on the sprinkler strength function to obtain the sprinkled depth of water at a certain rain barrel (3). The calculation method has a simple operation, is fast and can effectively save on costs, providing a basis for optimizing the movement speed of the translational sprinkler (1).
